one last one........they all have an arm raised or outward from their body.......thats all i got, man...

more random guesses:

Have a phobia

Speak multiple languages

were all in xplosion

were they all zombies in marvel zombies?
have they all followed orders from mags at some point?

That map will ruin all of them with ease

they are all poses in comic books.

What?! Juggernaut owns that map! That's the number one reason to use Krakoa in a sealed game! He ignores terrain on movement, including plowing through blocking. He can move his full speed and attack. If Krakoa manages to hit him, it's only for 1. And he should have no issue with getting adjacent to an opponent!

I think the true calling of this map is for very high point games and/or putting 2 of them together and playing a 4 way game. All the damage would help speed it up and finish the game in a timely manner.

For more normal games its kinda ridiculous.

17 guesses so far... that's certainly uncommon. Keep going, guys! Someone has to win!

On this map he is super open to outwit, then he becomes a immobile brick with a helmet.

Is it a character thing or a heroclix thing?

That's for you to figure out. Sorry.

they all make it harder for the the map to do damage to them?

Compared to what? No.

They're all your favorite characters?

Mmm...they've all killed another person at some point or another.

Is it that they were all on an X-team at one point in their career?