So, from what I'm gathering, this ZXP guy is the one holding the rights, name, etc. to Planet MegaMan. Well, if the staff all kinda got along (I'm not sure), and they all wanted to revamp Planet MegaMan, in theory, couldn't you just do it and name it something different, like Galaxy MegaMan, MegaMan Nebula, Sailor Scout Roll-Chan, or something? I mean, I don't know if it's worth the time and effort to everyone involved, but if the name is the only issue and everyone involved wanted to do it, then I see no reason why it couldn't be done under a different name.
However, I don't know everything that went on, so this is just based on what I know.