Kermit and Piggy will get back together by the end of the first season.
- Considering that we're four episodes into the show and it's already dropping hints that Kermit and Miss Piggy still have feelings for each other despite their breakup (mostly on Kermit's end, but Miss Piggy wasn't exactly subtle when she said she "[doesn't] know what [Kermit sees] in [Denise]" in "Pig Girls Don't Cry"), I'd be very surprised if they don't get back together eventually. Still, if the show gets green-lit for more seasons, it's possible that Kermit and Miss Piggy will go through the "break up, get back together" pattern several times. It's not like it hasn't happened before.
- As of Swine Song, Kermit and Denise are no longer dating (or at least are on a break from their relationship to think things through), and Kermit and Piggy are on better terms again, even if they're not back together yet.
Walter doesn't appear because he's behind the camera
- The conceit of the series is that it's an in-universe documentary about the making of Up Late With Miss Piggy. And who better to make such a documentary than the world's biggest Muppets fan?
