The reprint that you are under the impression is going to happen would be Duel of Ages 2. I would expect a redevelopment with many improvements rather than a straight up reprint.
DenGad is correct, at least according to my research on the topic. There is a sequel in the works, that is, a new game. I don't believe there are plans to ever reprint the original. I've seen some artwork for the sequel- can't recall where. As to when it'll come out, I believe that would be difficult to predict. Venatic does not rush itself. They'll put the game out when they're ready.
Side-note, there was going to be an RPG that was to focus on the larger world (in which DoA is something akin to a sporting event). Once upon a time, it was going to be Venatic's next release but DoA 2 seems to be what they're going for instead (which probably makes better business sense.)
If you're trying to decide whether to wait for the sequel or attempt to get DoA second hand, I'd go with the latter. There is no telling when the sequel will come and DoA is an AMAZEing game.