Would Mistress Death be able to use ALL BECOME MY SERVANTS, EVENTUALLY SP on an opposing character that is KO'd within 8 squares of Nekron if they are on the same force? Here are the SPs:

The way I am reading it is that any time an opposing character is KO'd within 8 squares of Nekron, BLACKEST NIGHT SP is triggered. Blackest Night then removes said character from the map after actions resolve. Therefore, Mistress Death would not be able to use ALL BECOME MY SERVANTS on any opposing character that is KO'd within 8 squares of Nekron.

Is this correct or would it be possible to choose the timing of the powers, thereby allowing ALL BECOME MY SERVANTS to trigger before BLACKEST NIGHT?

As i see it when opposing character is Koed, Mistress death my choose to bring them to her side at top dial as part of her force. but Blackest night would cause that character to be then friendly to nekron, heal one damage, be assigned one action and then removed from the map.

So basically mistress death, could use her special, All become my servants, but the servant would punch her in the face for nekron and then leave the game forever.

I would think that Nekron's BN power trumps Mistress Death's ABMSE because BN is an automatic effect.

The wording implies they happen simultaneously, meaning active player chooses if you must use Mistress Death first (and decide whether or not to use it then, if you do Nekrons power can't trigger then) or Nekron first (and then Mistress Deaths can't trigger).

That makes more sense.

I have a question. Wouldn't Nekron's power still trigger if Mistress Death went first?

Character is KO'd.
Mistress Death's power triggers and puts them next to her her at full power(Her power does not stop them from being KO'd though)

Nekron's power triggers because an opposing character was still KO'd. They are still considered KO'd(which they are since Mistress Death never stopped them from being KO'd), they are not removed from the map, and the rest of the power triggers, eventually removing the character from the map after its action.

Well the wording on Nekron says "you may immediately assign them one action as a free action." Since removing them from the game is dependant on assigning that action, should you decide not to assign that action Mistress Death's power moves ahead as normal and the character is not removed.

Thats my take anyway, feel free to point out where I may have made an error.

I didn't think about that. The only action in Nekron's power is the free action.

Does that mean if you do not give the character the free action that they are permanently a member of your force to do as you wish and only removed when it is killed off? Would the opponent score victory points for killing off a character that is already considered KO'd?

From the Player's Guide:

#059 Nekron
 When using The Blackest Night, if you opt not to give the figure the action, then the figure is removed immediately from the map.

I think it goes something like this

1 since it is your turn you can pick to use mistress death's SP and put it on your side and nekron gets nothing

or

2 you can use nekron's sp first and then mistress death's SP would not kick in cause it is friendly to your force then removed.

Nekron SP says explicitly that the character is still considered KO. Which is all it takes for Mistress Death to pick up a "replacement".
So what will happen is BOTH SP happens, and at the same time.
You KO an opposing character, you can give a free action to that character before removing him from the game AND the character's controller can pick up one of your KOed character that cost less than his and put it next to Mistress Death.
You are the active player, you got to decide which of the two effect is resolved first. But it doesn't matter that the KOed figure is still on the map when it comes to Mistress Death power : it only has to be KOed, which it is at that point as far as Nekron's SP is concerned.

So the way Captain Kreuger is reading it.... you KO the character, you could give the free action from Nekron and then (since the character is considered KO'd) you could move them adjacent to Mistress Death provided that the fig meets the prereqs for ALL BECOME MY SERVANTS.

This makes sense to me.

I think you are missing a key line in Nekron's Power

THE BLACKEST NIGHT : Whenever an opposing character is KO'd during your turn within 8 squares of Nekron, they are considered KO'd, but do not remove them from the map and heal them of 1 damage. After all current actions have resolved, that character becomes friendly to your force and you may immediately assign them one action as a free action. After this action is resolved, remove that character from the map.

The free action and removal does not happen until all current actions have resolved. So since Mistress's deaths power is on the stack(to steal the m:tg turn) that action along with the attack that killled the character have to resolve before the free action from Nekron's power kicks in, after which the character in removed.

That would be my take on how the two interact.

1) Character Killed
2) Nekron and Mistress Death Power Triggers
3) Active player chooses Nekron's power to go first
4) Character is still considered KO'd
5) Character is not removed from the Map
6) Character is healed of 1 damage
7) Mistress Death Power Triggers
8) Character is placed next to Mistress Death
9) Character is healed to his or her starting line
9) All current actions have resolved
10) Character is given a free action from Nekron's power
11) Character is removed from the map

We're talking of a scenario in which Mistress Death and Nekron are facing each other, right ?
If we agree that each character are in opposing forces then at the moment Mistress Death power is triggered - i.e. when the character is KOed - it is STILL friendly to her, so she cannot choose him as the target of her SP.
In other words, the scenario is :
1/ a character friendly to Lady Death is KOed next to opposing Nekron. Let's call it the Victim, for clarity sake
2/ both SPs triggers, active player choose whch goes first, but since Nekron SP mostly resolve after all current actions are resolved while Mistress Death's one resolve immediatly
3/ her controller takes an opposing KOed figure costing less than the Victim and place it next to her on its first clic,
4/ then, after all actions are resolved, the Victim is healed (if not already), he changes side and is given a free action by Nekron's player
5/ then the Victim revert back to Mistress Death's player side and is removed form the game
And if they belong to the same force, why do we even bother talkin' ? Nekron's SP allows him to give a free action to an opposing figure, and Mistress Death power activate only when a friendly figure is KOed. So there is no way that the 2 powers can interact when both characters are on the same side.
Point is : the Victim of Nekron cannot be brought back by Mistress Death SP. Ever.
Either that or I really had missed something here.

Both powers only work on opposing characters

Neither power KOs a character, so if Nerkon and Mistress Death were on opposite forces then only 1 of the two abilities could ever trigger on a specific kill.

If Nekron and Mistress Death are on the same force, then it would be impossible to keep an opposing character that was killed within range of Nekron, due to Nekron removing it from the map.