Tango was resurrected.. as Rogue; except this time they got wage concessions.
The real danger of course is if they still fill the planes with Rogue-density seating, and don't get enough push back, they'll continue to expand it to the rest of mainline (see 77W-HD).
As for an airline trying to start up out of YHM... good luck. They may be able to grab some of traffic that's heading to BUF now, but it won't be enough to be any sort of threat to AC, and if they're schlepping to Hamilton to save a few bucks, AC an probably do without.