I'm wondering the same thing, but eren activated the founder power before in human form
Shingeki no Kyojin
Plot twist:
Eren and Zeke already touched hands inside the plane, the activator for the rumbling was getting his head blown off.
4D Chess.
Gabi is the MC now
>Eren is in titan form when Zeke gets shot
>Zeke lands on top of Erens hardened titan shell
>Eren using the power of the WHT connects with Zeke's titan form, activating the Founding titan
>He uses this power to erase the memories of Eldians, causing the shitshow we see in 119.
>Zeke didn't actually scream, it just appeared that way from the perspective of Eldians, instead the rumbling had just begun.
What was it then?
nobody
BUT MUH KAJI
OUR MIGHTY FALLEN
War sounds.
I bet they feel pretty darn silly for waiting around for the perfect plot moment instead of just high fiving on marley