OK but really between the unown bumpers, the Raikou tie in for Sleep, the prominent Champion Silver tie in for Masters and I think some bursts of GS music it does feel weird there's not even a "GS slapped on the eshop [so you dirty cheaters cant use cloud saves]" announcement. I wonder if a remake might still be in the cards for this year, too, just because Nintendo's 2024 seems pretty slim and having someone handle a remake again would make sense...
Anyway I think it's interesting that this still seems to be the modern Lumiose, so probably still pretty recent in Kalos' life time. Any time we were thinking of the "Legends" moniker it was like Arceus' conceit of farther in the past, but really there's nothing stoping them from looking at any given one.
It does say "redevelopment". We'll probably go from "old" Lumiose and over the course of the game build it to the "modern" Lumiose. Might have even been partially inspired by how Jubilife develops as you do sidequests in LA.
After seeing how the A's markings are stylized as stems or roots, it probably is a new Pokemon.
Maybe we also get a "B" and "C" Pokemon
I’m not yet counting out the possibility (however unlikely) of it being set in the future.