I know there are a number of different Enclave sets planned, although not sure if any of them are based on Fallout 2 (only played 4 and half of NV myself). I haven’t heard anything about the APC, though they’ve mentioned that they’re planning on doing full size Virtibirds if that’s anything? In terms of ground troops I’m not sure either, although I’m certainly tempted to file off the BOS logo from a few T-60 suits and paint them in pre-war colours
We’re getting Frank Horrigan, he’s Enclave from FO2 so seems so. They will look different however, they are keeping the PA in the FO4 style bulk compared to the slimmer previous games.
As Bishop said, with Frank Horrigan confirmed, there is no doubt we’ll get the west coast enclave. As for pre-war US and China, we will have future released based on DLC. So far we only have Far Harbour confirmed, but theres every chance we might get Operataion Anchorage, or even just some standard soldiers in future releases.