Where you been? There's the four-door S2 category in addition to the further grandfathering of both pre-2003 and hybrid LMPs, the restrictor breaks given to pre-2003 GT1s, and the invitation of the Maserati MC-12. They're at least one step away from ACO regs by now.
Sorry, no opinion if a sixth, SWC GT-like class would be attractive to teams.