Yeah, I agree with pretty much everyone else above me. The inevitable 'Saving Aqua from RoD' plotline seems too important for this game. True, DDD isn't just the Mark of Mastery exam, but Sora returning to mend everyone's hurt (or whatever that was... Me tired. Memory no good. :C ) just seems too important for a side game. Granted, a side game with a plot on par with a numbered title, but a side game nontheless. I think all the saving is KH3 territory, possibly the next saga's.
Besides, as pointed out by numerous people before me, why would Yen Sid ask Mickey to summon Sora and Riku for the MoM if he couldn't give them the exam? Even if being an ex-Master stopped Yen Sid himself from giving the exam, Mickey could certainly do it. He mightn't be the ideal administrator, but he'd certainly be more qualified than the newbie Master stranded in the RoD.
So, yeah. TAV will probably be mentioned, perhaps at the end to tell Sora who he has to save (instead of just telling a data version of him that'll forget as soon as they close the journal... Seriously, what was the point of that?!). But I don't think any of the BBS trio will make a physical appearance.