Well from the trailer, I can tell there are more than just Hoth for Walker Assault.. This makes me happy. My intial fear was that each of the games maps were stuck in a single game mode. Supremacy will most likely be my favorite game mode, but I really enjoyed WA for what it was. I look forward to trying it on different maps.
Right now I'm concerned that Boba is going to be the most OP hero because of his mobility alone. He'll be able to travel fast form his spawn and start lighting fools up. They really need to address the hero spawn issue.