Just how much could actually fit in the Indy Jones area? I figure they will re-theme Backlot Express to a Star Wars theme, maybe something like Mos Eisley Cantina, but if the 'land' is only going to include Star Tours over to Indy, they might make it something more general and not specific to Tatooine.
I imagine they can fit in one large attraction building for an E-Ticket, and still have space for a spinner attraction in the Indy area. There is currently no spinner attraction at DHS, and not really much for the 'all-ages' crowd to ride.
They could then move the Jedi Training Academy indoors to the Sounds Dangerous area, and use the Turtle Talk technology to have Yoda 'train' the younglings. This wasn't my idea, someone else here had come up with it, but it makes sense.
Would an E-Ticket attraction, a spinner, an expanded Jedi Training Academy, a re-themed Backlot Express, and Star Tours be enough? Personally I would like to see it much much larger, but I understand the reasons for keeping it confined to that area.
I do think it makes more sense to build in the Indy area than the Muppets area, as demolition would be much less, and it's sort of in a corner, and not really a thoroughfare area.
As for Carsland, I assume it would be pretty much a carbon copy of the DCA land, though maybe the two supporting attractions (Luigi's Tires and Mater's) will be different.