According to Reuters:
“Though its box office haul will be truly magical, it is unlikely that the bespectacled boy wizard will beat the “Twilight” kids. Still, the final “Harry Potter” film is on track to be the No. 2 advance ticket seller of all time behind “The Twilight Saga: New Moon.”
“A senior IMAX executive told TheWrap that Potter pre-sales were “huge.” The theater company reports that all of their midnight screenings are sold out, with only a few seats still available for its 3 a.m. and 7 a.m. shows.
That said, it does not look like “Deathly Hallows: Part 2” will unseat “New Moon” as the biggest pre-seller. When the “Twilight” sequel opened in November 2009, it had the box office field more or less to itself, whereas “Deathly Hallows: Part 2” will have to compete with tentpole fare such as “Transformers: Dark of the Moon” to claim its crown.
The Harry Potter finale is performing better in its midnight and early screenings, but “New Moon” had stronger Saturday and Sunday pre-sales, according to Fandango.”
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Keep in mind that these totals are only taking into account pre-sales, not people who will just walk up to the box office. No one will know for sure until Monday at around 4:00pm when the official tally comes out.