The hottest rumor is about new Tamer Skill on Digimon Masters Online.
Looks at this youtube video : http://www.youtube.com/watch?v=gBCF8plJ2XQ
at end of the movie Marcus Damon Punch wild Digimon. Some people says that Marcus can punch, Thomas can Buff while Yoshino can heal,
and Taichi increase attack power. And nothing information about Keenan.
I can't say that it is valid information.
If the tamer skills are true to this game then it might come out after Player versus Player System (PvP).
But for now both version (KDMO and GDMO) doesn't have it yet.
Let's just wait and see their improvement system.