My HLE is mostly American in I, G, F, D, B, and A and Japanese in C.
If your HLE normally does not stock I or G cars, they will have them delivered from the local airport or a nearby HLE that does have them, so expect a TC/CV/GM.
On occasion, my HLE gets in Prestige and Infiniti's, and if I am quick enough, I can snag it and they just amend my return to SEA (the area manager sends a team out to collect any Prestige/Specialty cars returned to the HLE as soon as they are checked in, so it's luck of the draw).