We're flying into Orlando on JetBlue in August 2023 (domestic), and I see our flight details in the app have already changed to indicate we're arriving in Terminal C.
That's all fine and dandy, so long as they have actual car rentals there by the time we arrive. (I don't just mean the rental company counters, which they've announced they'll have, but actual cars you can walk out to.) We'd booked a Hertz rental for our arrival day, just for a few hours (to get us to and from our hotel, an escape room, and then to Disney Springs for the evening, where we can return the car at an adjacent hotel). That's not our typical practice, but I got a great deal with a AAA discount that brought the price to $90 even after taxes and fees -- even less than we'd pay if we took rideshares to/from the airport, hotel, I-drive, and Disney Springs. However, if we've got to walk the length of Terminal C, go down a couple floors, take a tram to terminal A, walk through Terminal A, head down another floor or two, and then out to the garage, that will be a pretty annoying way to start a vacation! (I'm guessing it would take a good 25 minutes to do all that even with small rolling luggage and no little kids, but nobody's posted any walkthrough videos covering it yet, so I'm spit-balling.) Our current reservation instructions tell us that if we're arriving at Terminal C, we should pick up our car at Terminal A: I really hope that will change in the next 10 months!