ok, i found this out about a week ago, but it seems like i forgot to post it ^^"
Voice actors have officially been assigned to the following roles:
Master Xehanort- Leonard Nimoy (Spock)
Aqua- Willa Holland
Terra- Christian Bale
i shit you not.
Terra is being voiced by Batman and MX is now, apparently, Spock from Star Trek.
imo, i think the VA's seem to fit the characters perfectly ^^
also, Mark Hamill (Luke Skywalker) has confirmed that he will be voice acting A MAJOR CHARACTER in BBS!
my money's on either Eraqus or Vanitas :3