I think I agree with you.
This argument almost sounds like "there's a 50/50 chance of myfavouritefaith(tm) being right. This doesn't work at all, as far as I'm concerned. But I don't imagine you are saying this.
I think, logically those two options are the only ones (n.b - "in some form"), but each one embraces such a multitudinous variety of possibility that we don't learn much from the knowledge that it was one of those two.
I suppose there is another option actually, which is that the universe came from nothing. I don't know if we have any conclusive evidence that this is impossible. I suspect that you will say that the nothing that preceded the universe was simply the universe in another form, and I'm not sure if I wholly disagree; but at the same time, its concievable that that view isn't correct.