That was a fantastic twist!
But there's something I still don't fully get.
This chapter heavily implies (page 13) that Baku let the "Protoporos Dynamite" event be leaked, to lure Lalo into becoming the kaiser at the worst possible timing, So why the hell did Baku say that it should NOT have been discovered, 2 chapters ago? https://mangadex.org/chapter/789265/9
For now, the only way I can understand it is the following:
I read too much into this chapter, and the colosseum event was never made to lure Lalo into anything. If Baku thought Lalo would take action on the 23rd, it's just because - as the chapter says - it's the ideal day to take down the weaker kingdom.
Moreover, Baku didn't want Lalo to know about him trying to get lv.80 allies, since it would hint at his true plan. But somehow, Lalo learnt about Champ and Ryuusei anyway, used this knowledge to deduce Baku's plan, prepared a counter of some sort that we have yet to see in action, and then acted like he felt into his trap. That's why, several days later, BK is in a bad situation and regrets that his trump card was leaked to the enemy.
Did I understand anything wrong? (it would not be the first time ^^')