This rumor has been around since the beginning of 2012 if I remember correctly. I'd like to see the space somehow become the home of a half-and-half expansion of both Fantasyland and Tomorrowland. On a personal note, I'd rather see a Vulcania-based addition to take up the old space. That way you can keep a submarine-type attraction (just make it a dark ride) of 20,000 Leagues, and have some other nifty stuff. Yes, Jules Verne may not be as well known as other authors today, but whatever. It'd still be a great setting and a welcome addition to Fantasyland (because of the limited space, it'd be better as a part of Fantasyland to rival Florida's beautiful additions).
Don't get rid of Autopia. It's one of the few attractions left from day one and the ONLY Tomorrowland attraction left from day one.
Good riddance to Autotopia! I used to love it as a kid (as most do), but our trip in August proved to me that it's time for it to go. It stank. It was not futuristic at all, and it looked like it belonged at the zoo in my hometown (run down and old).
If it's going to stick around, it needs a major overhaul. I'd love to see an electric car ride that would fit in with the Tomorrow Land experience but with Chevron's advertising I don't think that will be anytime soon.
I think more so than electric cars (although those are nice too) driverless cars would be an interesting upgrade to Autopia. Google and Toyota already have working prototypes but realistically the technology is still decades away. Maybe they could also incorporate a way for guests to program different routes so people will want to ride multiple times to see all the routes and also maintain some level of interactivity.
Widen the lanes, bank the turns and then you have a new use for the old Rocket Rods vehicles. ;)
There are a lot of reasons why Autopia hasn't been upgraded:
1. The unresolved issue of the People Mover tracks. Should there be a massive Tomorrowland upgrade, they could fold the removal of the People Mover tracks into that budget.
2. Chevron was the sponsor, so the ride had to use gasoline.
3. TDA had bigger fish to fry with BVS/Carsland
As everybody knows, Hong Kong has electric cars on its Autopia.
Hong Kong Disneyland Autopia - YouTube
There have been past plans for Autopia 2.0 which involved electric Martian rover vehicles with upgraded ride functions. I could see Autopia being totally re-landscaped to a Martian/alien environment with new ride vehicles, perhaps even an LPS trackless version with maneuverability, but within certain limits, i.e. no going backwards or bumping cars in front or going off track. So, there are lots of options . . .
Even with having to keep the ride above the Subs, it could be an E-Ticket, there were plans for an Incredibles E-Ticket to replace Autopia which used LPS pods and guest "choice" to select various tracks.
Who knows what is going to get built?
Again take it with a grain of salt, but from what I was told during my last visit to Disneyland. The Autopia and Finding Nemo are suppose to be removed to create the footprint for the rumored Iron Man attraction. From what I remember Disney chose not to renew their contract with Chevron for the Autopia. Also Microsoft and several other major sponsors have renewed their contracts for Innoventions for at least another 2 years with the promise of product updates to the home.