https://www.youtube.com/watch?v=Q8a4iucRJJs
CW revealed a new trailer for the upcoming season of Riverdale at San Diego Comic Con over the weekend. The clip was mostly a recap of last season but featured some new footage (spoilers, see above).
In May, creator and showrunner Roberto Aguirre-Sacasa hinted that a men's room kiss between Kevin Keller and Moose might have the chance to blossom into a full-blown relationship, telling EW: “My hope is that it continues. It'd be nice to see Kevin in a romance again. But they've got a big cloud looming over them, which is the death of Midge. Which is kind of par for the course on Riverdale. But I'm rooting for them. I hope it's more than just a moment of passion.”
Now it appears that will happen. Casey Cott, who plays Kevin, shared more details in various Comic Con interviews. On a cast panel Cott said Kevin and Moose are “definitely a thing” in Season 3, and offered this to MTV:

Cott added: “I think making out in the bathroom cemented us as a ‘thing.' We're trying to push Moose in the right direction [in terms of him being out].”