I thought the Age of Super Blockbuster got started in 1989, the year of Burton's BATMAN, INDIANA JONES 3, GHOSTBUSTERS II, STAR TREK, Disney's HONEY I SHRUNK THE KIDS, Cameron's THE ABYSS, & the highly lucrative LETHAL WEAPON 2. BATMAN is the model of contemporary summer movie marketing & the importance of opening big. The template for summer line up complete with counter-programming with dramas & comedies started to take shape in 1989: look at the grosses for DEAD POETS SOCIETY (opened in June), WHEN HARRY MET SALLY (July) & PARENTHOOD (Aug).
In todays' dollars BATMAN & LAST CRUSADE more than $400M. LETHAL 2 would have made close to $300M. Summer 2013 looks lame compared to the time before Netflix, Tivo & HBO. That was the time when comedies families & decent adults could enjoy could gross around $200M adjusted (HARRY & SALLY, PARENTHOOD, DEAD POETS). These are quality PG-rated stuff, not the kind of crass entertainment we get today (BAD GRANDPA, MILLERS & IDENTITY THIEF).