It'll probably come up next arc.
This can't NOT have massive fallout.
A city was destroyed, and heroes are basically on camera doing fuck all to stop it. Everyone who died or was maimed will be a martyr, which will probably be used to the League's advantage since who would suspect the city that was massacred to be the ones harboring the terrorists that did it.
Also the villains are probably going to rest for a bit after this. They're both exhausted and have to get their bearings. Though I suspect or really just hope
the next arc that centers around them is just them dicking around enjoying Redestro's money and all the new toys they just got handed the keys to.
Also despite their power ups, there's still some limitations for Toga and Twice.
Twice will only do the Sad Man's Parade if he sees good reason to, namely the immediate death of all his friends. His clones still showed warning signs of rebelling. Toga needs to KNOW how the person she's posing as quirk works too.
Shiggy however is overpowered out the ass.