Everything GF has been doing up to this point hints at a Yellow Remake.

Amie is a beefed up version of Pikachu's original mechanic. UBs and Pokestar Studios were prepping for Team Rocket Mechas as boss battles.

and they left out the Battle Frontier in ORAS unlike HG/SS because trAsh beating them is his only actual achievement in the anime.

https://www.youtube.com/watch?v=M7ru_eeOeL8