Well, i thought he was gonna go to the demon world, and we were gonna get a time skip during which he got stronger and maybe even saved Amanda's dad, but this is also cool, i hope we dont get a memory loss arc tho, would kinda suck tbf
Now that i think about it, isnt this the setup of a classic character arc for a member of the protagonists party? One of MCs presumed dead friend gets kidnapped and experimented on by an evil organization and later reunites with MC in a mission fits this situation pretty well