Folks, this is synergy at its finest. You’ve got an insanely popular book adaptation hitting theaters next week and another, equally fan frenzy-creating adaptation coming in November. It’s an easy pairing. And now it’s official: the next trailer for the first part of “Harry Potter and the Deathly Hallows,” which hits theaters on November 19, will run in front of “Eclipse” when it opens on June 30, also known as next Wednesday. Fanpeople who are sad at missing the opening of The Wizarding World of Harry Potter last week — my hand is way up high in the air on that front — can take solace in knowing that sweet “Deathly Hallows” goodness isn’t too far off.