Sure, there is pressure on the Mavs and Cavs, more so than any point in either respective series. But, I think there is more pressure on the Spurs and Pistons. Both teams were EXPECTED to advance all the way to the Finals. Both teams are better than their opponents. While the Spurs have gotten tough officiating, the Pistons have simply been outplayed.
I expect both Dallas and Cleveland to have great energy from their home crowd. And, I expect both to have a good start in each game.
I expect both San Antonio and Detroit to win because they should. But, each series has been so strange, so wild, and controversial enough to make me believe anything can happen, including both teams losing rather handily. I hope that's not the case.