A team of mutants overpowered one massive mutant monster at the box office during the Memorial Day holiday. Fox-Marvel’s “X-Men: Days of Future Past” debuted with $91 million beating last weekend’s No. 1 hit, the Warner Bros. sci-fi adventure “Godzilla,” which earned $31.4 million in its second weekend, according to studio estimates Sunday. “Days of Future Past” is the second-highest opener in the “X-Men” franchise after “X-Men: The Last Stand” debuted with $123 million in 2006.
