i don't know, and chances are no one will guess. i mean who predicted that ep II would be called attack of the clones?
i would like it to be based on anakin's turn to the dark side cause that is the pivotal part of the saga.
i think it will be something dark, cause, as obi-wan said, its the start of 'the dark times'
maybe star wars Ep III: the purge of the jedi