My expectations are that we'll have to wait until next year to get a replacement in. The Republican Senate is watching the Trump show and starting to feel that their base is very unhappy with them, which is going to result in a little red meat being thrown to the base as senators try to establish credibility as proper conservatives. I think they know that putting Loretta Lynch on the SCOTUS would exhaust the last of most right and center-right voters' patience and create an outright Republican voter mutiny by November, so I really don't think they can let it happen regardless of how much the chattering classes criticize it or their opposition fires up its own base over it.
I'm also a believer that the perception of the economy around election day is what will drive voters' decisions relative to the incumbent party. This is not good news if you're a Clinton or Sanders fan. That leaves us looking at a Republican nominee. From an LGBT perspective, Trump is about the best-case scenario of the candidates pulling more than 3% of the primary vote (I actually like Kasich best of this bunch, but his chances are basically equal to mine). The good news about Trump is that he doesn't have a divine mandate to screw over the LGBT community. OTOH, I've seen very little evidence that he has a plan (yes, I know I could end the sentence there) to really reach out to us and he may put an extreme candidate out there to keep the base happy. After that, it's all downhill.
Altogether, I'd probably have rather kept Scalia. I appreciated his humor and strict constructionist tendencies. What we're likely to see replace him will probably be more of the "no government unless it's enforcing my moral code" than he was, and without the wit.