If you're talking about the next Ellie shower, that's looking more like Christmas 2023.
Neil has been confirmed as having nothing significant for the foreseeable future, so Sophia "fooling around" with him we can assume is never going to happen. Same as Bennett, Tyler, Kevin, Braydon, Jason, Haru and all the other guys that didn't make it to the Favorite Character poll.
Considering that Liam is the last (or maybe 2nd last if he's lucky) in the poll, we can safely assume that he's nowhere near popular enough to warrant anything other than Cathy in the swinging event, and possibly Nat in a threesome with Sophia.
And that's if the game gets that far. We're talking at the earliest PD20, which mightly easily be 15 or more years away.