Board Thread:Theories/@comment-31099706-20181018152716/@comment-4383890-20181020192902

That sounds eerily like what Cinder Fall from RWBY was trying to do with the Maiden Powers. In case you don't know, it's what you suggested Eren is trying to do, which is to take these mystical powers that can be inherited by individuals, one individual and one power, and take all of them for himself.

I didn't even think having more than one was possible until post-Liberio, but with Eren's drive to wipe out everyone outside the Walls, I have no doubt he's not finished taking Titan powers for his own.

Which leads to what happens when he gets to the Colossus Titan, currently in Armin.