I think you just nailed it perfectly Dre with “cinematic inbreeding” being the most efficiently accurate way of explaining the ST’s constant borrowing and repurposing of the OT along with a near constant appeal to nostalgia in so much that the latest trailer uses pretty much half of its runtime for actual OT and PT footage with the OT footage itself making up around a third of the total runtime.
So a 9 film saga trailer (even though its more of a sizzle reel exclusively for D23), that shows clips from the films in release order (ending with new clips from Ep9) , uses a third of its runtime to show the OT (3 films out of 9 turns out to be a third 😉 ) and this is supposed to show how Disney is constantly trying to appeal to nostalgia?
I think the fact that they’re showing footage from the previous films in the trailer is supposed to be inspired from the second trailer for Avengers: Endgame before it released in theaters.