Even though I'd consider LGPE more like proof of concept games rather than ones in the mainline series, I just don't see them going to another remake as their next big title.
While I usually don't throw all my eggs in one basket, I think it's a pretty safe bet that we'll get a small tease of the new Gen 8 games, and we might even get a tentative date of Holiday 2019 (which is pretty much just code for the 3rd Friday of November, which would be the 15th this year). I'm not going to get too excited as there's a long way to go until then and a lot of stuff we still won't know for a long time, but it'll be nice to have our first bit of news since the Meltan reveal back in September.