On his interview with morningsomewhere Burnie said he wasn't very interested in doing more RvB (except maybe a spinoff in that universe)
What do you wanna see from Red vs Blue?
I'd be happy if they just made occasional PSAs - less commitment that way and they could still satirize current pop culture trends. But a spinoff sounds like it could be fun.
I'd honestly be down to see more experimental stuff machinima-wise. Like PANICS or Strangerhood. Those didn't get nearly enough love imo.