So the Heat won. Question is, who is their rival for next season?

What teams would you guys consider the Heat's biggest rival, or at least obstacle? I feel like a lot of teams and their fans gathered up a lot of animosity towards the Heat in the playoffs, so it's hard to pinpoint where the emotions flare up. I feel like the Heat have picked up everyone from the Mavs, Knicks, Pacers, Celtics, and to some extent the Milwaukee Bucks!