I'm not so sure about that, Anthony. There's already lots of hand-wringing over the Wolverine leak, and seeing as that it has been downloaded a million times, I'd say that means a lot of people won't bother to see that film again in theaters. Piracy has killed many a film at the box office.
And good reviews are never a bad thing. For those people who are on the fence about seeing a film, they might just convince them. I imagine the success of The Dark Knight was in part due to the extremely good reviews it got. For me, that flick was "another Batman" that I did indeed have on my list of films I wanted to see, but I wasn't hotly anticipating it. However, when all kinds of glowing reviews came in, way better than what could be expected from a Batman film, TDK suddenly became a must-see for me. Quality does still count for something. And reviews are simply the written form of the fabled good word-of-mouth.
Back on topic, it's a safe bet that negative reviews will come in. Frankly, I was surprised that everybody so far has been that positive about it. Cause I was thinking (and still do a little) that overcoming that old stigma "Oh look, they're doing another one..." is difficult, new and fresh approach or not.