I actually had pretty much the same basic ideas. Including recreating the Flight into Imagination scene via a standing preshow at the end of the queue right before load/unload. Basically what Dinosaur does with its preshow (or alternately, the double Haunted Mansion stretching rooms at WDW), but as a return of the original physical scene instead of a video.
Basically here's what I sketched up using Park Lore's layouts as a basis (thanks very much to them for providing these nice drawings)-
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Imageworks moves back upstairs where it belongs. The downstairs lobby is restored as closely as possible to its original bright pastel colored mural-adorned open space cyllindrical glory. A spiraling queue that also uses this freed up open space (going out on a limb here and assume that this ride would probably command much longer waits than what is there right now). At the end, a standing recreation of the Rise into the Clouds and Flight into Imagination scenes. That scene was approximately three and a half minutes, which is very similar to the runtime of other preshows like Dinosaur's. Double alternating theaters so the queue doesn't halt for too long (some lost capacity/efficiency is inevitable without the turntable sadly).
I've moved and consolidated the load and unload areas, freeing up space for other scenes. Load is now the entry into the Dreamport. There was also some extra space to expand the initial Dreamport ride scene, so I went ahead and used it. After that, most of the original ride should now be possible to recreate faithfully until the film reel tunnel and finale. This is why I consolidated and moved the load and unload further up the track, to free up some more space for a new finale based on the original. At unload, I sort of just came up with a purpleish/blue prismatic exit tunnel, not unlike the rainbow one upstairs but with colors that more closely reflect the downstairs lobby and Figment/Dreamfinder. At the end of that, I threw Disney a (undeserved) bone since they love their giftshops. Whatever incentive it takes to get the ride done right and actualy keep it around.
Guess this belongs in the armchair section, but eh.