I've heard that McGann wouldn't mind so long as he gets to wear his hair short. Actually, I'd love to see Eleven cope with immediately post-time-War Eight; it would involve piles of angst, but with that edge of hope that yes, he can get up and go on and become the Doctor again. I mean, yes, it's part of my headcanon that Eight regenerated upon sealing the Time Lords away, and then crashed in the Brig's garden (TARDIS's idea, naturally) and got nursed back to semi-sanity there, but I'd be willing to give that up if Moffat can come up with something suitably awesome.