Few days ago, it was announced that Killer Instinct will be back, and the developers opened a forum to get direct feedback from the fans. They will be reading all the forums, but once in a while they will also be asking concrete questions about different aspects of the game. The first question is: "What character would you like to see return for Killer Instinct, and why?"
You can answer in this thread:
http://www.doublehelixgames.com/community/?topic=double-helix-games-community-qa-1-0
Now, your opinion does matter!