Things are moving insanely fast but while there has been a bunch of build-up, I feel like either a lot of things have to go Baal's way for the story to last long enough to give closure on a bunch of side threads of he's just going to get shut down like halfway into the story because so much shit is still stacked against him that he can't be aware of. Like Iruma's personal connnections alone covers 5 of the 13 crowns (Sullivan, Bachiko, Mephisto, Amuryllis, Henri), and the Barbatos clan of the Three Heroes, and Baal is making enemies of the other two Three Greats as well. Plus, there's no way Amduscias lets this slide unless Baal successfully spins a story about it being necessary to bring back Delkira, but he's stacking so many lies that having others simply communicate to each other clearly about what has happened would bring him down. The Three Greats - or Sullivan and Mephisto at any rate, also saw Iruma get the first shot off against Behemoth, and Mephisto in particular also should have figured the connection between the barrier that blocked Iruma's shot and the barrier put up by Amy from Border Control, which could at the very least implicate both Narnia and Baal for collusion (given Amy is under Narnia - well, Fenrir's command, and that Amy didn't interfere with Baal's strike on Behemoth). While Baal is the current "Big Bad", and realistically conflict arrives soon, it's way too early for Iruma to take the throne (imo the natural conclusion of the story) - honestly I had the initial impression that between Narnia and Baal, Narnia would be the first to over-extend, but I feel like now the story's going to shift massively and in the aftermath either Baal will be a distant final threat or slightly more likely an incapacitated idiot while the following arcs will be dealing with the fallout.