Well, seeing how this is quite possibly the last game of Dragon Ball for the Xbox 360 and PlayStation 3, Namco Bandai should make it worthwhile so that both sides would be in a win-win situation.
If Namco Bandai could include
Dragon Ball: Advance Adventure as a bonus game in it, I'd love it. It reminds me of Sonic the Hedgehog from the Sega Mega Drive in Sonic Generations (requires to gain rings through the stages and then used them at the store to purchase the bonus game), though, it's unlikely for NB to even think about it.
Dimps' Burst Limit 2 showed that it had a sequel but let's just be honest, Dimps reached Budokai's limit long time ago with Budokai 3 & IW (B3.5), so they're sort of done with it now. However, if they could develop a Dragon Ball game like
Saint Seiya: Sanctuary Battle gameplay style it would vary from the normal fighting stages, but having both in the same game would be great nevertheless.
They [Dimps] still have a chance at making something new & different whereas Spike has already shown what they're capable of.