Here are two things I would like to bring up:
1. What if the new Overlord, Roshuo is Takatora's and Micchy's father?
In episode 26, Takatora was talking with someone on the progression of the
Ark project, so perhaps that was his father, since it was mentioned on the wiki
That their dad is the head of Yggdrasil, and is using the scalar system and the
Ark project to trim down humanity for the Inves to have a new home.
Takatora is against his fathers actions, but Micchy goes along with their dad
Because he's gone off the deep end. That would also explain how Ryouma
Knew about the Overlords existence, because he was hired to fulfill some
Kind of plan from Takatora's father.
2. What do you think would happen if an Inves devoured an Energy Lockseed?
We've already seen what happens when elementary Inves eats lockseeds,
either becoming an animal form or into a giant, the sames goes with the
berserk types, they grow massive.
If I had to guess, I would assume an Inves devouring an energy lockseed
would become a Psuedo-Overlord, gaining vast intelligence and power, but
not on the same level as the Overlords. Becoming something like their
right-hand men.