So - I finally got an answer as to why the carousel is very clearly featured in the released piece of Dumbo art that was issued as part of the re-imagined Fantasyland annoucnement.
Anyone who has seen the plan will know that Dumbo's Flying Circus - the new "Dueling Dumbos" complex + interactive Big Top Queue is not placed anywhere near the carousel - in fact, it's almost at the furest possible extreme from it within Fantasyland's boundaries.
So why's it pictured in that art? Are they moving the carousel? Are they not really moving Dumbo after all?
Um, actually - none of the above.
The piece of art was rendered for a proposed refurbishment of the attraction at Tokyo Disneyland several years ago. Yes - you're looking at a not-at-all-new piece of concept art done for Oriental Land Company, which instead was just slapped into the presentation to give it a bit more beef. This also explains why the art implies the ride itself will be under circus tents, which will NOT be the case.
Interesting little AI exclusive for ya on that one!