UFC Undisputed was a huge success when it hit for the first time last year, and it actually offered gameplay that was considerably different to Yuke's' other title, WWE Smackdown vs Raw.
In a brief discussion with Jonathan Durr, a game designer for Smackdown vs Raw, he admitted there has been sharing between the different teams, although it's quite minimal at the moment. "There is [sharing] and there's going to be more as the two projects go on. I think right now muscle flex is something they're looking at as well as some other areas."
It will certainly be interesting to see what other things can be shared between the two games, although hopefully they will retain their individuality.