AceShowBiz is reporting that the final HBP trailer MIGHT play with Inkheart:

The publication further noted that the new trailer is most likely to be attached to another adventure fantasy movie released in the U.S. on the expected date, “Inkheart”. It is still unclear though whether this claimed-to-be final trailer for “Half-Blood Prince” will be containing similar footage as the Japanese trailer, which screen shots include scenes of Bellatrix attacking Hagrid’s Hut and Snape on the Astronomy tower with Harry among others.

Thanks Ivana!