The way I see it, the test server reflects the whole thing, what it's going to be like. So I'd assume, if Geffen 4 is still there (and it is, I saw), I don't see why they would remove it.
I'm not even sure if they're going to change the spawns - I mean, doesn't prison have like totally different monsters? Or doesn't Geffen 1 have a hunterfly in there?
People would complain a lot about changed monster spawns in these areas (including Geff4), so I'm not sure whether they'd go through that extra trouble for that.
Axle is right though, this is something good to ask in the Beta Discussion forum. I'd have a few questions too, so yeah X3 We could all do that and hope for the best