The closest thing to a "Deep Core" GC in 2.2 will be the Reunification GC, or Crimson Empire as the other Warlord factions. Part of why you don't see much of the Deep Core anywhere, though, is because the Deep Core would, for obvious reasons, have more crowding issues with planets overlapping. We'd likely have to use a new planet set with a different background model, which goes beyond the scope of 2.2
This game is all about changing history I mean what if instead of daala being the one to unite the warlords it could be one of the others
That can happen in any GC as it is, including Reunification.