I need the option "It depends"
Yes - because that would be awesome
No - I can see a few reasons why I wouldn't want to perform if I was Mark: for example if I'm not in line with the "philosophy" of the event. Like, if I decided that any future reunion must only be about non-profit causes, then performing would be the last thing I want to do.
That said, I chose yes because I don't know whatever is in Mark's mind