As of right now the upcoming schedule can filter by All My TV Shows/My Premieres/My New Shows.
The thing is when you use All My TV Shows and there is a a show in your watchlist and you have not started it, it will fill the upcoming schedule with all the episodes from the show.
Would it be possible if you have not watched any of the show to only show the premiere on the upcoming schedule?
Perhaps an new filter such as…
All My TV Shows + My Premieres
or…
All My TV Shows + My New Shows