I like the idea of Damian being Robin, but just if they do an script where he has a health relationship with Bruce/another mentor/partners (happened in the begin and actually with Jon);
I also like him founding a new identity, this Grey Ghost sounds cool, but don't match so much with Damian's posture, I think;
My favorite idea is still flame bird with Dick, but I think it is out of menu.
What I don't like is how the characters have no evolution learning with mistakes, Damian is like Naruto saying in loud voice he is going to become Hokage and being completely impulsive, what brings problems he can't deal with, he should be more smart than that...