If Light In The Piazza wins best musical as well as the most awards, which I think it will anyway, it may extend past September.
If Dirty Rotten Scoundrels wins best musical, not that it's sales are bad, but they will definitely increase a bit, and I'd imagine lotto would be harder to win.
Those are really the only ones I think that can have impact. Actually there is one more:
If Norbert Leo Butz loses, tony voters get violently attacked by broadway fans, broadway worlders and one very pissed off Wickedrentq.
"If there was a Mount Rushmore for Broadway scores, "West Side Story" would be front and center. It snaps, it crackles it pops! It surges with a roar, its energy and sheer life undiminished by the years" - NYPost reviewer Elisabeth Vincentelli