I feel bad for Gowasu. First his disciple turns evil and managed to get Future U7 entirely destroyed (well Zen-O did it, but he was the catalyst). Then just several months later, the guy that was the tipping point for your disciple's downfall unknowingly starts a win-or-die all universe battle. Dude just wanted to relax and watch all the funny videos on GodTube...
The "lose and your universe is destroyed" rule is only known by Goku/han, Beerus, Whis, and the Kais, right? I'm gonna go and say Gohan wins, and Goku too. As someone on another forum said, clean sweep, U9 gets destroyed, and that's when everyone realizes what the stakes are.
Also, how are the universes paired up again? 6 and 7 are, so would it be 5 and 8, 4 and 9, and so on?