Pardon me for saying so, but that is a rather reckless statement to make around here. The last thing the Borg wave needs is for a bunch of people (jittery as they sometimes can be) to jump ship on any Wave 1 pre-orders because of unwarranted speculation about the possibility of a 2nd wave. You simply can't speculate about Wave 2 until Wave 1 has been released. If they sell well, DST would have every reason to want to continue.
I agree with your first statement, that they surely will see Wave 1 through. They have put quite a bit more effort into promoting it than most anything else we've seen, and seem to be pretty far along relatively speaking. If this proves wrong, we'll all be disappointed for sure, but let's not get worried yet. Who really ever believed these would be out by the original estimate? Raise your hands...