I don't know if they'll ever pop up here unless there's another general exodus from reddit. Will the starcraft community move over? Barotrauma? Mechabellum? Monster Hunter?
Kbin's auto-hotlinking is broken until the next release, as I understand it, but here are direct links that will work for kbin.social users like yourself:
For now, I'd mention stuff without enough people to get a lot of traction on the larger gaming communities, and then bud off as the population increases. Or, y'know, start one and post content each day and wait for people to start straggling in.