Idea:
What if this is in fact a new location, and it will be used to “house” the revamped/refreshed/reimagined GT original holy trinity (Grand Valley, Trial Mountain, Deep Forest)? They could be changing up the scenery and environment around the track, and it could be a way to save resources by making one large environment rather than three separate ones - think of DT Gardens - new layout, but a new backdrop didn’t need to be made to introduce it.
Pretending that is the case, I still don’t know what to make of the bridge - it looks far too long to fit any of the old circuits, but then again, PD could be changing up the layouts somewhat (or maybe even expanding some of them). It could also be a new original track, and it could come alongside the trio. But another idea I had was if they put all the tracks in the same region, what if they’re putting them in close enough vicinities to connect them (the bridge being one such connection), and also introducing a GT-original super-circuit layout?
That’d be madness.
I have no firm theories right now though, I’m still intrigued that PD is teasing something with such vague detail for an update almost a month out.