Yeah, Outback/Mojoverse Dazzler seems the most likely, especially since that was the costume she wore in the arcade game. It's also easy to make.
Dazzler's got a ton of costumes, though, so they might surprise by tossing in something more recent.
If they keep going with the X-Men Legends waves, I wouldn't be surprised to see a Longshot. Wave 2's focusing on some heavily fan-requested figures. A Longshot redo, or his modern look, seems like it's going to end up with a lot of requests from X-fans now that some of the really long-awaited/never-before-made ones are hitting. His ToyBiz ML hasn't aged well at all.
As excited as I am to get a Rogue figure, I really want one of her more modern looks. Maybe they'll finally put out that canceled one from a couple years back.