Other than the "celebration" of ESB's 30th Anniversary, I don't see the reason for another "Celebration" this soon, other than a chance to further fuel the Lucas cash machine yet again...
I went to CIII (the party for EpIII) and CIV (the 30th of the original movie and the hype for CW)...both were fun, but expensive...
If CV is next year and not easy (ie: cheap) for me to get to, I'll be passing.
I'd like to hope that they aren't going to "Celebrate" Star Wars into a hole like Star Trek was in the '80s with conventions everywhere, all the time. Nothing special about that...