hellblazer/swamp thing duo would be pretty rad

I would prefer to see unclixed Duos that could really only be clixed as a Duo.

Marvel:
Fenris (Strucker Twins)
Styx and Stone

DC:
Body Doubles
Double Dare
Punch and Jewelee
Trigger Twins
Demons Three (Okay its a Trio ala Avengers Prime)

Deadshot and Jeannette.

It'd push Wizkids to make a single Jeannette clix too.

Not to prod, but all three were before Fear Itself.
Thor & Hercules (Chaos War)
Gambit & Rogue (Giant Sized X-Men)
Joker & Harley (No Man's Land)

Hehehe

How is Wolvie + Jubes not on this list?! :P

They've even struck perfect back-to-back poses many, many times!

Apollo and Midnighter
Wonderman and Beast
Havok and Polaris
Starlord and Kitty Pride
Wolverine and Jubilee
Hulk and The Thing
Ghost Riders Danny and Johnny
Nova and Starlord
Dr. Doom and Mr. Fantastic
Thanos and Death
Captain America and Winter Soldier

I agree with this. I would go even further and suggest that a quick way to get the original Seven Soldiers of Victory in Heroclix would be duo figures: SSK & Stripesy, Green Arrow & Speedy, Crimson Avenger & Wing, Shining Knight & Winged Victory, and maybe Vigilante & Billy Gunn.

I'll admit when I first heard of the duo mechanic and tried to think of a pair of characters who would never warrant an individual dial each, Punch and Jewelee came to mind. And yet, they've never been made. (Similarly, when I thought of "what DC characters deserve Probability Control?" I could only come up with Hazard and she also has never been made.)

And just to tick off the "But you can't team up Joker and Batman because they would never team up" crowd, I would want a Joker and Batman duo based on one of several Brave & the Bold comics where they did team up.

I second Dr. Doom and Dr. Strange.

just realized I forgot to mention Nova/Star-Lord. Preferably in this iconic pose, at 300 points so we could split merge Chase Star-Lord(obviously based off of him holding the cosmic cube in Thanos Imperative, as suggested by the wording on his card) and GG 001 Nova

daredevil/black widow you'd think would be a no brainer considering they shared a series for awhile.

Great list. I think you nailed some iconic, critically missed duos.

DC Body Doubles would be fun!!!

Big fan of "frienemies". So I wanna see the times the heroes had to team up with the bad guy for the common good. So my votes are for:

Dr. Doom/Reed Richards
Dr. Doom/Iron Man
Wolverine/Sabretooth
Nightwing/Deathstroke
Beast/Darkbeast

I'm sure there are more but that'a what i got now

This is one of your best lists, Slade. Thoughtful choices, all.

For the Hawks, I would expect a whole lotta mace upside the face, and a trait like Swift's:
(Special) Reading the Air Currents: When an opposing character with wing or wing transporter symbol uses the Carry ability or hits with an attack, place an Air token on this card. Give Swift a free action and remove an Air token to give Swift a move action as a free action.

Spidey/Torch is also a great idea.

As an homage to one of the best teen sidekicks ever, I'll also suggest Icon and Rocket I.

My number one? They never listen, but I'll say it again, as I have since duos first became a thing:

Sugar and Spike!

This is a very good idea! That duo would be a stealthy, acrobatic, short-range Incap cannon.