In the most recent Disney Files (the DVC newsletter), they have an article about the 7DMT called 'Drawn' Together and with the tagline "Animators, Imagineers, creating next-generation Audio Animatronics Characters". The article states "Emboldened by the challenge, the team dreamed up a groundbreaking new design that would blend hand-drawn, computer and Audio-Animatronics animation, and then partnered with Walt Disney Animation Studios to help materialize their vision".
Also, Imagineer Dave Bosset is quoted as saying in regards to the 7DMT: "This is a complete integration of animation media into a dimensional figure, and it's like nothing you've seen" and "When you look at the Dwarfs in the attraction, you won't know what you are looking at. They're just alive, and it's jaw-dropping".
I'm curious as to how the final product ends up. The insiders on here don't seem to have been impressed by what they have heard about the ride. I'm cautiously hoping (but not convinced at all) that there is some impressive show scenes that we will be experiencing on the ride that have been kept a tight secret. In particular, I find it interesting that the cottage scene at the end of the ride has been very tightly guarded, so I think that is the best bet for a real visually impressive and immersive scene that would make the ride.