Board Thread:Manga/@comment-44086949-20191205133131/@comment-37493549-20200125232228

Tdfern14 wrote: Wow this has become a long debate. But what is it even about? Tl;Dr just give a short answer. He thinks the Attack Titan has the power to physically travel through time and become invisible, and that Eren physically brought Zeke into the past to watch the events in Grisha's life in real time.

Rather than what actually happened, which was them both viewing Grisha's memories that Eren has inherited.