House of Torture is most likely going to split off into its own stable soon. Whether that happens tomorrow or at the G1 depends on how crazy Gedo's feeling.
As for the future of their main event scene, I'm somewhat more optimistic. I imagine they'll be in a holding pattern until things open back up, but once it does there are lots of possibilities. Shota Umino feels like he could be put straight into the main event on his return, and Ren Narita would probably not be that far behind given his talent and who's training him. Cobb and Takagi may be old, but they're fresh faces in the main event scene (plus Shingo is just the best anyway). SHO's heel turn is annoying, but he's a far more talented wrestler than EVIL, so I'm sure it will click for him just like it clicked for Jay White. And of course, there's the AEW connection where you could bring in guys like Moxley and Omega to instantly slot into the main event scene.