Not a "rematch" per se but is there any chance Joe Heck could go for his old seat in 2018?
Perhaps. But it's never fun to come slinking back to your old seat after getting beat for your promotion. Very few ever do it (Steve Pearce in 2010 is the first to come to mind).
If we mention Heck, then I should also say it might be possible for Patrick Murphy in FL-18 as well, considering how popular he was in that seat.
Hell, maybe even bring Bruce Braley back to run in IA-01. That 2014 loss is looking less and less like Braley's fault, in hindsight.