We have made the decision this week to put SMITE Rivals on hold. While we are still excited by the general concept of SMITE Rivals, it was clear after early testing that the game needs significant additional development before releasing. With SMITE Tactics, our turn-based strategy game set in the SMITE Universe preforming well, we have decided to focus our energies on that for the time being. ~HirezStew
So in case anyone was wondering why there has not been any publicity about the alpha at all since SWC, this is why. Development will be focused on other upcoming games rather than branching out to a third beta. I personally agree with this as they would be spread far too thin in areas between Paladins, Tactics, and Smite.