Thread:PhoenixDragonSamurai/@comment-7985501-20140924200154/@comment-4389268-20140924202642

while its not confirm yet, i believe it might be an infinity stone due to its alien origin.

And duh, he appear in all non X-men (post X3) Marvel movies. He is the god of Marvel, he could even kill Thanos faster than Thor and Odin's combine powers.