Since I've never thrown in on one of these threads before...
The PM track needs something moving around up there to make it worthwhile, but for Disney to spend tons and tons and tons of money to re-open the People Mover in its original form, which was not exactly a huge draw (how often did anyone actually wait in line for it?) doesn't seem like a good idea.
The Rocket Rods, while obviously a nightmare and not exactly well thought out, was a pretty fun ride which was marketable enough to actually bring people out to the park for it. Obviously, the RR's would need a ton of stuff done to the track to ever get it to come back either.
So, what about an idea that I haven't seen anyone else really mention -- what about a future themed launched roller coaster ride? It could travel slowly the same way that the people mover did, and then launch at a high speed out of the Buzz building. After that point, the ride could maintain its speed with relatively minor changes to the track configuration all the way until just about the end.
Yes, DCA has a "launched" ride, but the idea could be to have it more flat and to keep the speed up for the entire ride. Giving it a bit more thought, have it roll relatively slowly into Buzz, where you are told that the Peoplemover has been upgraded to a new magnetic system that will take you for a short tour of Tomorrowland which will stop to drop you off near Space Mountain... but then right before you launch, "something goes horribly wrong" and they launch you out of the Buzz building at a high speed through the next part of the ride. At the old second level of the Starcade, create a second show scene which would slow the ride down for a relatively leisurely crawl back to the station. Something like California Screamin', only with a backstory and real theming on the ride.
I expect we'll see the Incredipod people mover idea though, which I am not a fan of at all. I think I'd rather see the 'nothing on the PM track' idea than that. Then again, I bet that I'm in the minority there.