Why does everyone here take as granted that ORAS will have Emerald elements?

So far, not a single Emerald element has been confirmed. Furthermore, there are several Emerald features that are already confirmed to be gone:
-Kyogre and Groudon confirmed version-exclusive
-Rayquaza's story is completely reworked
-Steven is the Champion
-The PokeNavi doesn't have the Phone mode
-No Battle Tents, only Contests
-The Trainer Hill is not on the map
-No sign of Mirage Tower

And there's probably a few more.

The only indication of anything Emerald-related is that "Delta Emerald" trademark that could be anything (including nothing).

So, debunked Emerald things - at least seven.
Confirmed Emerald things - None.

Stay in denial, faggots. Emerald is dead, unless they break muh patterns and indeed release a game titled "Delta Emerald" (which is more than unlikely - the next core game to be expected is either Z or XY2, or whatever set in Kalos) we won't even see a single Emerald element returning. I wouldn't even count on Battle Frontier at this point - if it was there, it would be revealed by now. Also, CoroCoro news focuses almost exclusively on Megas lately, indicating that there's not much gameplay stuff left to be revealed.

So, get over it or stay in denial, faggots.