Questions from 119 have yet to be answered. Such as Levi, Falco, and whether or not Eren will die (I think with Ymirs power he won't). To sum it all up, my theory was for the most part accurate. I guessed that the founder was connected to Ymir in what I call, THE TITAN REALM. As for how things played out, I was off. I anticipated Zeke would betray Eren, because of Eren's personality. Eren has one goal that I believe remains the same, Eradicate all the titans. I thought the Ymir would be a little more of a divine being, but I was wrong. Since time has stopped within that realm, I think this gives Isayama potentially a couple chapters to give us the truth about the titan wars and just history in general. My final theory is that all the titans/titan holders will be gathered in that titan realm and then Eren will use the Attack Titain's ability to rid the world of hatred. I think the Attack Titans' ability is "memories" as we saw with Kruger. So Eren should have been able to see what the future holds, as well as unlock the past. Then with the founders power he can share that pass with the world, similar to how King Fritz erased everyone on Paradis's memories.