Memorial Day weekend typically sets the standard for summer box office sales, and the successful opening for “Thunderbolts*” is the start of an impressive holiday box office, experts say.

Marvel's 'Thunderbolts*' is opening on top of the domestic box office, while Ryan Coogler's "Sinners" is having another great hold.

Studio estimates released Sunday showed “Thunderbolts” kicking off with a solid No. 1 debut, though it fell shy of Marvel’s more spectacular launches.