While wave 3 couldn't include the AOTC versions of Owen and Beru, I wouldn't mind seeing at least a new version of Uncle Owen in Wave 3. Another cantina alien (or two) would be nice as well.
I definitely think a Vader in this wave would be overkill especially since every time they seem to do a ROTJ wave there's Vader/Anakin in there in some form or another, so I'm expecting a Vader in Wave 4 if that's a ROTJ wave.
While I'm okay with them completely ignoring EP1 in the basic line in 2008, I'm hoping that in 2009 they at least dedicate a pair of waves in celebration of the 10th anniversary of TPM.