Paradox_
It's good for him to be a spectator of Rock's fight but don't interfere with the fight and betray after Rock dies he can run away, maybe focus on Kurowashi, Basara, Xerxes etc.
TehStorm:Probably not. Rocks winning would be a set back for Damian so i have no doubt he would probably join Roger and Garp against Rocks then the contrary...