The raid is absolutely not going to fail.
What happens now is we get a bit of the roof top fight, which then gets relegated to subplot while the Flying Six get defeated and the Calamity fights get set up. The Calamity fights might tie in to the rooftop as well. Then the Calamities go down, and we get Kaido’s hybrid and the fight there starting in earnest. Plus time for any flashbacks.
Kaido will be on top temporarily, he’s almost certain to beat Kid, Killer and Law totally, Luffy and Zoro potentially going down for a bit as well before the grand finale which will happen over the flower capital