I don't doubt his ability to give us a great Yoda, because the original was a puppet and the prequel was CGI, but I feel it is a waste of a role for Andy to play. Yoda died in the original trilogy, so all that would be left of him are flashbacks and prerecorded holograms. I feel, Mo-Cap or not, Andy deserves a role of his own to bring to life.
It may be just me, but I see a bit of a resemblance between Andy and these two Kenobi's. Possibly the son of? Who knows what ol' Ben did while he was at the cantina on Tatooine? Picking up ladies, that's what. Boom. Gollum Kenobi!
A new Jedi
I don't have Photoshop, and I think I saw a better photoshopped picture of Andy as a Jedi with a green lightsaber in a traditional Jedi tunic, but I couldn't find it so I improvised... I love Andy's work with motion capture, but I think it would be awesome to see him be a real life human Jedi...with a green lightsaber!