some days ago in the usual monthly official ORAS site update, along with some cool info about the legends abilities, new megas and all that stuff... a tab with info on Rayquaza was also added.
That seemed...unnecessary? But before I considered that this might be a build up to some coming news, I thought.. maybe nothing special happens to it (at least till DE?) so they might wanna get that notion out of the way, by simply putting Rayquaza on there. Like "hey guys, look we totally ignore that Emerald ever existed, but don't worry, Rayquaza is still gonna be there."
Next thing, corocoro features Rayquaza for no reason too... but it also asks a question in the sense of "what connection does Rayquaza have to mega evolution?"
You'd think it'd have to do with primal reversion not mega evolution if anything, but that is certainly curious.
And then there is the announcement of the second mega evolution anime special in early november. A few weeks before ORAS release.Now look at the poster
As expected, the Hoenn starters make an appearance... BUT WTF is Rayquaza doing there??
Conclusion: we will find out about whether Rayquaza has any secrets to show off in ORAS before release, and if it does, it will destroy the possibility that delta emerald could be gamefreaks plan.
Not sure whether that would be good or bad though.
No DE could mean that ORAS postgame might feature tons of new stuff and somehow append a bit of Emerald into the games after being a copy&paste of exclusively RS for the main story.... but it could just as well mean that the full Hoenn story will never told in updated fashion, and that the battle frontier might be rushed...