Don't have time to read through all of this, but you are severely underestimating the bus times and travel time. If you are taking the bus, say you walk from MK to Contemporary, thats 10 minutes from the gate of MK, maybe a little shorter. Then potentially 20 minute or more wait for a bus and 20 minute ride. Its easily going to be an hour between parks. Uber could shorten it, but I still think riding a ride at epcot and leaving by 10am will be very tough. As for express buses, you know they only go every half hour right?
Oh it's going to be tight. There's no way around that. But I don't think it's necessarily as bad as you're thinking.
We can get into MK at 7:45 am for EMM. We will be there early to be among the first people let in. We are planning to ride 7DMT as our MK ride. We could theoretically be done our one ride before 8:00 am and be headed back out of MK. It will still be an hour before actual rope drop there so we should have a huge crowd to contend with getting back out of MK.
From there we will walk to the Contemporary and see what the estimated wait time is on the next bus to DAK. If one is coming soon, we can hop on it. But more likely, we can call a cab, or an Uber, or Lyft, or Minnie van, depending on how those are going to work. It is a long-ish ride from the Contemporary to DAK, but that's ok because DAK doesn't open until 9 anyway.
We have a FP from 9:05-10:05 in DAK for Na'vi River Journey. It's a short ride so once again, theoretically we will have enough time to walk to the Express bus and grab the 10:10 am bus to DHS. (If we miss that bus, no way we'd wait around for the next one. Instead, we'd go back to the front of the park and once again grab an Uber, Lyft, or Minnie van to DHS.) And if we're done NRJ early, we certainly wouldn't wait for the Express bus; we'd just grab a cab, Uber, or whatever to DHS.
The Express bus at DHS would drop us off right by RnRC and TOT, and hopefully we will have secured FP for one of those attractions en route. Ideally we'd still be able to make the 11:00 am Express bus to Epcot, but that's probably unlikely. If we have to walk, we have to walk. Uber, Lyft, and Minnie vans continue to be an option too. DHS is now our FL wildcard with the loss of the Great Movie Ride. One fewer attraction to disperse the crowd.
If we can get to Epcot by 11:15-11:20, we have a chance to grab a quick ride on Spaceship Earth (if we are able to get a good FP time) or on Gran Fiesta tour or Figment or something.
And while we'd love to do a photo and an attraction in each park, if push comes to shove, we can drop the goal to do a ride and just grab a quick photo before we bolt.
Nothing is guaranteed and it's not going to be easy, but I do think it's possible. We have our plan, and a million back-up plans at the ready. And regardless, it will be a lot of fun to try!
