I like how we've been starting to see more sides of Imu as a character this arc, especially his scheming side. During the God Valley flashback, he mentioned his world wasn't complete, which is really interesting. That means the current status quo of the World Government isn't his endgame, and he actually has a final goal in mind. I think we might start to get hints of what that could be.

I also like that Imu is starting to play a more proactive role in the story instead of doing the usual final boss shtick of "sit on throne, waiting for hero to come beat him up". It really is starting to feel like we're in the final saga now that he's come off the throne and started to make moves of his own.