You know, and I know I will get hate for this, I would actually prefer it that Lucas remained in a consulting position for the new Trilogy.
To me there has always been a parallel between George Lucas and Peter Molyneux. Both started out great, but then, despite making great promises turned out to not be so good in Movie Making/Game Design as everyone suspected.
But also they are both very imaginative people.
Lucas DID have big part, how big is very open for debate though, in creating the original Star Wars Trilogy, but remember he did not really write those movies nor did he direct them.
So pushing him back to a consulting role, and not a decision making one, might actually turn out good.
JJ is a good Director but his movies are all a little stale and less then they could (should) be, so maybe it could be a very strong team-up between those two. In my opinion both need it, even JJ, and please don't answer with "but his movies are very successful so he is awesome", just think about which other movies were very successful...
All of his movies have very blatant flaws, but almost never in the direction, so there is something else missing, and maybe, just maybe teaming him up with crazy George might do the trick.
Honestly I am much more scared of Disney then of anything else... -.-