Fantastic fight. Best of the year so far and probably going to be the best of the year, period. I had SSR winning by a round.
I think a rematch is what we all want to see. That said, if the money isn't there or they want to build it up again, then they can allow both guys to chill for a bit then face each other in a years time. There are so many good options and HBO has a lot of them on tap: Warren, Sultan, Tso, Yafai (hopefully he nuts up), Casimero, Viloria, Higa (not confirmed but possible), Cuadras, Gonzalez, Nietes, Ancajas (maybe, though I doubt it given the trajectory his career is taking), Arroyo (both).
I think, ideally, SSR can take a voluntary defense in Thailand against somebody relatively easy (Nawaphon Sor Rungvisai is ranked by the WBC at #14, so that would be a fairly easy defense) and Estrada can face somebody of a similar caliber then they rematch for Superfly 3. If they're feeling ambitious, SSR could face Yafai or Ancajas in a unification, and Estrada can face Arroyo then rematch. So many great options.
also, crazy to think Arroyo hasn't fought in nearly two years.