After having seen Last Jedi, I think it's likely that the next episode in the series will have us jumping forward in time quite a bit. I could be totally wrong, but I don't know that there would be much of an interesting story to tell if we pick up right where we left off. I think we'll be dropped into a situation where the resistance has had time to build up their numbers and strength and they're hiding out on some planet. Poe, Finn, and Rey have taken the lead and Finn and Rose are now a "thing." Actually, I see it being very similar to the beginning of Empire Strikes Back.
If they do go this route, or a similar route that has a big time jump, then I think they will have Leia die in between the movies and we read about it in the opening crawl or learn about it in the very first few scenes (maybe even start with a funeral scene). We learn that she did something heroic, or eventually succumbed to an ailment that plagued her after her float in space, etc. I wish that wasn't the way that her story ends, but I'm not really seeing a better way.