The E4 levels & orders is one main thing concerning me about these games, even though it's not a major implication on the games.. it bothers me. With recent mechanics of the games we've seen the Elite Four being equally levelled being battled in an order of your choice, before this in Ruby & Sapphire it was still the progression mechanic which is much better IMO. With these being remakes, I'd like to think they would want to keep everything pretty much as original as possible, including the levels and teams for the E4, having said that obviously the exception of new Hoenn evolutions such as Dusknoir is reasonable.
In the original Ruby & Sapphire we saw the level range from Level 46 right upto Level 58, that's more of a challenge as it has a level curve rather than no increase at all, with ORAS I'm hoping they do the same again.. otherwise they would have to alter the levels of the Gym Leaders too which would cause some disruption to the level curve in the game as a whole. I don't think they would remove (and reduce) any Pokémon on their teams down to 4, Sidney as an example has Mightyena, Sharpedo, Shiftry, Cacturne and Absol all of which are Hoenn Pokémon, and I can't see any of them being dropped from his team for any good reason. Guess we'll have to wait and see but I'm really hoping they don't change the system for this.