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 Studios' latest film, "Thunderbolts" had a solid opening weekend as the box office continues to soar past the doldrums of the first quarter.

Sony’s R-rated horror film “Until Dawn” remained in the No. 5 spot with $3.8 million from 3,055 venues, down 53% from its opening weekend. The ultra-gory survival thriller, which cost $15 million, has amassed $14.3 million in North America and $34.7 million globally.