When exactly is LOF decided for this? If my figure is blocking LOF to the attacker would I be able to see my figure KO'd because it's getting pulled off of the map? Thank you in advance for this.

THE BLOOD OF INNOCENTS: When an opposing character within Johnny Blaze's line of fire KO's another friendly character, you may remove all action tokens from Johnny Blaze and replace him with ASM #046 Ghost Rider on its orange starting line.

I think you need to be able to see the guy doing the killing before someone actually leaves the map but I'm not sure on the timing. Good question.

my first thought would be the KO'ed wouldn't block LOF. First you have to see if a figure is KO'ed. They reach the first KO slot, and are removed. Now that he's KO'ed, does anything kick in (FF, Suicide Squad, Blaze). that is when I would think LOF is checked.

I would say based on the wording that the opposing figure must already be in JB's line of fire before the KO happens.

When I read it I interpret the phrase "When an opposing character within Johnny Blaze's line of fire" to mean the opposing figure must already be in his line of fire when you check for the trigger which is "KOing a friendly figure".

Any officials on this? I tend to agree with TheFreak as to how this would be ruled.

Since it does not state before or after, I would assume it means during. So the figure being KO'd would block line of fire.

Correct me if I am wrong, but you remove a figure from the board after it is KO'd. This further supports the assumption that LOF is determined prior to the figure being removed.

A further example would be an attacker with hypersonic.
-Flash runs 5 spaces.
-Pauses to slap Punisher.
-Punisher is KO'd.
-Flash is in LOF of Johnny, which activates his power.
-Punisher is removed from board.
-Flash runs 5 spaces around a corner (out of LOF of Johnny).
----Does Johnny swap before Flash runs away or after?

I am assuming he swaps after the Flash's action is concluded but it is activated at the time that Punisher is KO'd.

Another example that really challenges your thoughts on this.
-Giant figure with Energy Explosion shoots Punisher.
-Punisher is KO'd by attack.
-Johnny is behind Punisher but has LOF to Giant figure due to size.
-Johnny's power is activated.
-Johnny is dealt splash damage.
----Does Johnny change after he takes splash damage?

I assume he swaps after the action is resolved including splash damage even though his power was activated during the action prior to dealing Johnny damage.

In your second example, when dealing damage to multiple characters that are damaged, the person taking the damage gets to decide how the damage is dealt. So if you hit two characters standing next to each other and one has mastermind, if the damage ko's the figure that was going to be masterminded, you can just select the damage to be masterminded first, which also ko's the character. I don't see why this would be any different. You select Johny Blaze to be damaged in the attack and then select the other character to be KO'd, which then kicks in the trait.

Edit: misread what you said

Johnny Blaze and Punisher don't have mastermind.

But to your point that the attacked player determines order, let's say that you determine Punisher takes damage first. This results in him being KO'd.
.... Scenario remains the same....

Johnny's power is activated.
Johnny takes damage.
----Does Johnny change after he takes splash damage?

Again, I assume yes.

Ahh, sorry.... Perhaps I am not being clear.

I assume he takes the damage and then changes as opposed to changing and then applying the damage (with GR's toughness).

The damage from "splash" and the damage that KO's the other character all happens at the same time, so by the time his swap will trigger he will have already been damaged.

This is slightly incorrect. All damage from a single source happens at the same time, there is no timing issue for the player to decide. Mastermind works like that because it says "When this character would be damaged". This is also the reason why using MM on an Energy Explosion will cause the adjacent character to be dealt 2 damage once and not 1 damage twice.

Johnny Blaze would need line of fire of the attacker before the attack I would say. It's says when an opposing KO's a figure. Not after.

From the rulebook p. 4:
Being defeated is the same as being KOed.

The KOed figure should not block LoF for a "WHEN KOed" trigger.

Again, this is how I'm seeing it.