Here is my shot in the dark. They all had misprinted/mistakes on their dials/bases in previous sets and needed erratta in the Players Guide?

Shockingly, Deathlok23, while being completely wrong, has elements to his answer that are closer than anything yet.

I gotta wonder with some of these answers, do folks even check first? There's no Rogue LE!

Their keywords all span times different (or additional) than that of the sculpts.

All had been enemies of the X-Men at one point in time, and then later joined up with them?

All of them have a hairlip?

Each character has a point value?

all have errata / clarification in the new update?

This map is 100% comic accurate, I like everything about it and I think WK did a great job portraying the map. That said I just don't think it should be allowed in tournament games, it's too gamebreaking. I find it ludicrous that a player has to plan ahead for a map instead of his opponents figures.

Okay, I'm gonna save you folks some guessing now and let you know that the answer can be found in the Units section.

I actually find that to be pretty cool. Maps have always had game-deciding impacts, if you can just see what they are. Batman teams have long known this. Try playing unprepared for the Prison, or the Space map, or the Great Arena. Krakoa simply draws your attention to its impact with a dice roll.

Skocking is what I do best! ; ) If I was on a computer, I could check . Unfortunately my old ### phone & the Units Section are not friends. Going from memory here. OK, one more guess, they all have been reprinted in a later set?

All have a move and attack power somewhere on their dial

True, but keep in mind, those maps don't beat you up. They add another dynamic of the field yes, but they don't get up and punch Xavier out of his wheelchair.

Or they all have a power they didn't have before

In many cases, I'd rather take a risk at damage to a character than spend the whole game with my range halved (space), or my speed hindered (Hellboy Temple), or my Stealthed figures unable to hide (Rooftops).

It's certainly an aggressive map, and one that can make a big impact on a game; but it's hardly the first map to do so.

I keep finding one odd man out in this stuff

I was going to say, each figure shares a Keyword with every previous version of said character, but Rogue kills that one... Still looking....

Well that's never stopped anyone before! Ha ha!