I'm happy how much buffaloman has grown as a character. Everything was leading up to this moment. From Being a Devil to Hero and wondering what is his TRUE side to join in this series. Now, after facing The One who created him, Finally understand what to do. I hope he goes for.
Every fight in the Tower of Babel was not just a battle against a strong opponent, but a elaboration and further development of the characters. Okay, Sunshine and The Natural less so, but they were necessary for Ashuraman. Buffaloman had to lose here to continue and become stronger. And even if he switches sides, he and Kinnikuman will remain friends. It's very emotional and works so much better than in many modern fighting shounen.
So I was right about the outcome. Buffaloman lost but still won something important, something to help him becoming better. It was more emotional than I anticipated, I feel downright happy for Buffaloman on how much he values Kinnikuman as a friend.
So, what's the "true battle" that the Gods have been preparing for? Satan jobbed, what else is even on the radar that they would need to gather strength to fight?