Yeah, it would depend on how much is compatible...I expect none. It will take years upon years for HS2 to catch up with HS1 with mods, and that's assuming people like HS2 enough to port everything over and use those mods. And mods are the only reason we can do so much of our work. Both technical and object/map mods.
I expect a few new devs to start working on a HS2 game, but I strongly recommend against it as it just offers so much less than HS1, and will for a very long time, possibly never catching up.
HS2 is just HS1 with better graphics, maybe a few new animations and maps, so I don't even expect HS2 to be successful. In fact I would sooner expect all the new HS2 stuff to be ported to HS1 (if that's even a possibility).
Oh my... NM then. D'Oh!and apparently NEO doesn't even exist for HS2 yet?
Hadn't finished the download, so I haven't even looked at it yet, just saw a few screen shots.