If the battle frontier returns, do you want to see new facilities? Do you want something completely different?
I would love to see it return with even more facilities. Maybe they could have a few of Pt/HG/SS's facilities return as well. I would also like to see more items at the battle store available to decorate secret bases with.
I'm anticipating seeing
Pokemon Emerald's Battle Frontier in glorious 3D in
OmegaRuby and
AlphaSapphire. I wouldn't mind seeing the Battle Arcade, Battle Castle, and Battle Hall (and maybe even the Pokeathlon of Johto) make a return, though (the Sinnoh Battle Tower and Battle Factory would be kind of redundant). I hope that the Battle Tower (and the other battle facilities that contain a Double Battle mode) receives enhancements like an online co-op mode or something - essentially, whatever enhancements that the Sinnoh Battle Tower, Unova Battle Subway, and Kalos Battle Maison received.
I hope that a Battle Institute shows up either as a battle facility or as another attraction of Hoenn.
I'm hoping that the Trainer Hill (near north of Mauville City) gets integrated in the Hoenn Battle Frontier somehow (it fits the style of one, IMO), receiving its original varieties, the mode variants from
Pokemon FireRed/LeafGreen's Trainer Tower, and a possible new Frontier Brain design (that dude/building owner perched on the roof).
Finally, I'm hoping we get an actual full-fledged Battle Tent (I always envisioned Daisy Oak as the head of such a battle facility, for some reason...) Those Battle Tent buildings are designed so nicely in
Emerald, yet they're basically inferior battle facilities, being a poor man's Battle Frontier.. :x Hopefully I'll have more incentive to visit a "Battle Tent" this time around!