If we are going the Wikia route, we could have Mitchell remake it, or someone else could create it. We also could always have multiple admins for it if there's people who have a general understanding of Wikia and also are interested in it.
Right now I'm seeing that the general consensus does seem to be Wikia, which I think might work out pretty well. They seem to have the resources to fit what we want, plus things could be kept very organized through there.
Some time past it was suggested that there could be a wiki for MC fan works. The MLP fandom has one. It seems like something that could be a subsection of a MC wiki.
That might always be a definite possibility. On an MC wiki, there's a lot of different ways that we could keep a nice index/info of fan works on that.