@flacracker: The Evo folks had said pretty definitively this time last year that MK wouldn't be making any more appearances.
At a high level, the game had some demonstrable balance issues that players were actively exploiting. Injustice has more or less entirely supplanted MK's spot for the time being.
It was surprising (and cool) how long MK9 lasted at Evo. Remember, last year when the Evo lineup was announced, MK9 was part of it, and NOT Injustice, which hadn't come out yet. They later decided to include Injustice in the line up after some tremendous tournament showings shortly after the game's release.
I'm excited to see Injustice again this year, as apparently it's not a bunch of Supermans anymore. :)
I have a feeling Melee will be there. Evo people are probably using the fervor that this non-announcement will stir as ammunition to convince Nintendo to give permission for the game.
Someday, I'd like to see Skullgirls get some main stage attention. Maybe one day... :)