Pre-release ability précis:
Three powers, six different effects, two that work unpredictably and one that uncontrollably messes with your allies. Yep, that sounds about right.
Not so sure how I feel about the random nature of these abilities. Too risky to use in PvP against strong opponents. Might win the match for you, or be completely useless. I guess we will see what the actual numbers are on this before making judgment. At least they are somewhat cheaper skills, not 13+ ap like the last few characters have had. (Cage and Spider-Woman).
Also another character with green and purple actives and passive of another color. Ugh. Wish they would mix the color pie up more.
Huh. It took me a while to realize you meant ‘that four star character’, and not ‘that tinykitty character’ 
Totally a new X-men! - not Gwenpool 
Her passive is screaming Aunt May. When her heroes are constantly late for dinner and not doing their choirs she sends them airborne by grounding them and not letting them out of the house. But because she is Aunt May and the ultimate motivator she always picks them up and gives them a special tile to let them know she believes in them.
Not necessarily. Sending allies airborn is pretty handy in some situations
Mille the model
Hey, look at that – another 
My guess is that it is Medusa.
Her hair tosses allies airborne for protection. 
Super hair powers activate for damage.
If it is, my guess is she will pair nicely with Black Bolt.
Purple sounds like a “swinging the swords” kind of thing. I hope the animation changes depending on it being a row or a column,
Black makes me think that whatever she’s doing is making her allies run for their lives/jump behind cover. Hopefully some strong strike or attack tiles from this.
Green… Is this a countdown you’re supposed to match? It shouldn’t be just any kind of special tile or even a specific type that any random ally or enemy might make. And would the (supposed) countdown do anything if you don’t match it?
Doesn’t sound like a competitive character, but does sound potentially fun. Especially the passive. …We’ll have to be really high rank to get a black cover, won’t we? 
With his colors. Sounds like a Civil War 2 variation of She Hulk
Hello Gwen Poole.
Finally, a 4 
Squirrel Girl.
I’m not sure why anybody is treating this as a guessing game, it doesn’t take datamining (and indeed I haven’t done any) to see who that silhouette is.
I’m just glad Gwenpool is going to a 4*. I’m not sure I could have handled an “anniversary style” 5*.
Oh, and btw, this is ANOTHER green/purple/black with one passive. There isn’t a single green/purple/black with all active powers. What’s up with that?
Perfectly suits Drunken Master. But from another story …
I am actually going to guess Jessica Jones. Will she be drunk or sober?
So much this 
… would it be so hard to be all active colors, or even
or
?
Gwenpool officially confirmed - https://www.youtube.com/watch?v=a_gHuJ1Rd34