Board Thread:Manga/@comment-5774380-20160109013258/@comment-28314363-20160206162458

That's why Eren wanted Histroia to eat him when he was chained up and when she didn't, he even offered to be devoured by Rod's titan so he can return human and be the new King but they said he would be controlled by the first king's "ideology" hence why they opted to kill him instead.