Honestly, it depends on who stays and who goes.
I'd like to stay. I did last time. When I joined the boards years ago, I had been lurking for close to two years already. I had always wanted to be a part of the community, but Melee was well-established, and I don't have the technical skills to be good at that game at a high level, so I felt that I wasn't any use to anyone. I couldn't find new ATs or combos or any of that crap. It wasn't until I started getting into arguments with Yuna (for the uninitiated, Yuna is known for being the John in the European version of "no johns") that I realized that I could be useful to a burgeoning Brawl community in a theoretical way and by hosting tournaments of my own. That's why I did all the work I did.
But, the whole reason I stopped posting and being active in 2010 was because of how caustic and hateful (and plainly stupid) the community became. We can backpat and self-aggrandize all we want, but we sucked after the release of Brawl. We still kind of suck now, although we're definitely getting better. There's less sexism, there's less racism (hell, Prog is one of our most respected commentator emeritus), there's more professionalism on the stage. But, we're still banhappy, we're still petty, we're still horribly entitled. We haven't grown out of the HORRIBLE scrubbiness we inherited after the pros left in the wake of Brawl's release and the "new guard" (a bunch of uninitiated, young, unknowledgeable players without history to inform their actions) took over things. Our TOs are still spineless, acquiescing to any and all player demands, regardless of whether they ruin the game or not.
If the community gets better, I'd love to stay. I'd love to be a part of a community that embraces side events, that tests things IN BRACKET for money, that refuses to ban until ABSOLUTELY necessary. I'd love to be a part of a community that places value on players without tech skill, who know the theory and can create strategies that top players can learn from. I'd love to be a part of a truly inclusive community.
But, I don't know if we can be that, or if we will. If that's how it turns out, I'll stay. If we ban parts of the game day one, I'm giving up on this community forever.