My wishlist for ORAS:
Contests! Using RSEs original style, and maybe expand it so abilities affect how well you do too?
More Mega evolutions, especially Metagross and Milotic.
Secret Bases, with more items! And online so friends can visit them, just like the underground in Sinnoh.
I would love to see character customization come back too, also with more options like the
original outfits from Ruby Sapphire an Emerald.
Pokemon following you like HGSS!! But optionally, like have a button in the party menu to bring it out.
More Pokemon from other generations too, I mean it's been 3 generations and almost 300 new Pokemon since
the originals, they could use some of the newer ones to spruce up the region and add more variety to trainers,
especially the teams. This could definitely include some of the legendarys, like Regigigas, and they could put
Heatran in a postgame cave in the fiery path.
The Battle Frontier. Everything it was in Emerald, but upgraded and in 3D. With a wide selection of move tutors too.
MATCH CALL. I want to be able to re-battle EVERYBODY. Or else have gym rebattles on specific days like HGSS,
because having played through Emerald like 15 times I have never once been called by a leader for a rematch.
I would like to see either Wallace as Champion and Steven as the postgame strongest trainer like in Emerald,
or keep them in their original positions and make Wally the postgame strongest trainer, which would be awesome.
Also, give Wally and May/Brendan a overall expanded role in the game.
Maybe getting Johto starters would be cool too, to tie in with the originals getting them for
filling the Hoenn dex as well as getting Kanto starters in X and Y.