I wouldn't hold my breath for last bronx or fighting vipers. Neither really seem to be in very high demand. They're good games, but I think you'd be more likely to see virtua fighter ports or fighters megamix. It's a pity really. Sega has one of the most diverse stables of fighters in the market, and they seem to ignore all but Virtua Fighter.
I think, given the success of Rez, we may see a Panzer Dragoon port, especially if Project Draco does well.
Finally, the answer to your question is actually in your question. Virtual On is a hitmaker property, not am2, so I think it's safe to assume that it won't just be am2 games. That being said, am2 is arguably Segas most successful and consistently acclaimed development studio, so I do think they'll tend to dominate the port market.