I'd totally be up for another Xenoverse, I mean they did leave a small cliffhanger at the end so why not?
Problem I can see is that every DBZ game you tend to "relive" the entire series from Raditz to Buu, and beyond. Maybe they're waiting for Super to expand to like 80 episodes before a second game.
Then again, they could have more issues where the time stream keeps getting messed up. Would make for some interesting what if stories. Like what would happen if Android 16 was awoken instead of 17 and 18 and has his sights on Goku who's suffering from the heart virus.