A remastered version of Origins and Awakening, with Inquisition's engine? Sure.
But, " Origins 2 "? Why? About what, the Sixth Blight? Too predictable story-wise, and frankly unoriginal this time around, we've had a Blight-related story, it's called Origins, why that again? Ok, yes it kicked some ass, that game was (and still is) a masterpiece, I get that.
But right now we're already going somewhere potentially very interesting with the whole Dread Wolf / Mythal thing, it's not completely over yet. There's place for a fleshed-out DLC or certainly for another expansion for the main story. If not, the next "big" Dragon Age game that we'll inevitably have in about 4 years from now could well be the "sequel" of Inquisition (I do mean direct sequel; I.E. it starts exactly where Inquisition left off) and maybe we'll have something with a different scale to it, more "Origins-like", something more quantifiable and personal. We'll see I guess.
But honestly, another Blight, another Origins? That won't happen, simply because most developers out there can never replicate/reproduce the "same thing" two times over, especially not when the success comes from the original game of a franchise. That "rule" applies to most developers in the industry and can be extended to the movie industry as well. It seems that on a creativity/originality/artistic level it's almost impossible to create spin-offs or prequels or sequels that are just as good, much less "better" than the original creation. Either it's different but it's still good (not better), or it's different and it's much worse, but it's never "the same", it's never "just as good".
I would, however, certainly pay full price for "Origins HD", definitely.