You mean like how the tournament arc was interrupted?
There's really no reason for the arc to be interrupted, considering everybody is separated and it's only Izuku and Torino.
Maybe he means something like Iida doing something stupid and trying to take on Stain?
Otherwise, yeah there isn't any real reason other than maybe seeing all the mentors for some reason congregating to show off how cool their quirks are after mastering them, I guess