We have more news on ORAS with two more new Mega Evolutions:

Mega Glalie and Mega Steelix.

Mega Glalie receives the ability Refridgerate and Mega Steelix receives the ability Sand Force. But that's all the information given thus far on these evolutions.

Hopefully now that Glalie has one, Froslass will get one too! Considering its my favorite Ice Pokemon and my favorite Ghost.

I'll keep you updated.