Update: Removed some fake info, thanks to Miklotov for pointing it out!
It seems that today is the day of Pokémon news.
There are some leaked scans from the Japanese Pokémon magazine CoroCoro that reveal new “Mega” evolutions in Pokémon X and Y for certain Pokémon, including ones for Lucario, Blaziken, Ampharos, Mawile, Absol and Mewtwo. The Mega forms either get new typing and/or abilities, such as MegaAmpharos becoming a Dragon/Electric type and learning Mold Breaker.
Some brand new Pokémon have been leaked as well, such as Horubii, a Normal type, and Dedenne, an Electric Fairy type. Finally, a new Gym Leader named Koruni is shown in the scans, and she hold the key to understanding Mega Forms.
Check out the gallery below (sorry for the poor quality of the scans) and tell me what you think about the new forms.