This is just me thinking with my own logic, but...
As i remember Levi was given the Titan Serum.
in the battle against the Beast titan (not out by the time this is written) if he uses the titan serum it would turn him into a mindless titan until he eats someone with the same ability as Eren, but if he injects the titan serum on/in (idk) would that turn the Beast titan into a mindless titan, or have any effect at all? What are your thoughts?
Personally id love to see another Levi godmode moment, but a Titan Levi would be a clear second pick.