Warner Bros.’ Fandango preview screening yesterday at 1,200 struck lightning with a $3.3M gross besting the paid-preview figures of DreamWorks Animation-Fandango preview of How to Train Your Dragon 3 ($2.6M), Atom & Amazon’s WB preview of Aquaman ($2.9M), and Atom/Amazon’s previews of Sony’s Jumanji: Welcome to the Jungle ($1.8M) and Hotel Transylvania 3 ($1.3M) Although, previews are not a direct indicator of opening day, opening weekend or life of a movie, they certain…