The summer box office sizzles as Warner Bros.’ Superman and Universal’s Jurassic World Rebirth lead global ticket sales. Both blockbusters are drawing massive crowds, signaling strong momentum for Hollywood’s major franchises amid an increasingly competitive movie landscape.

James Gunn’s “Superman” showed staying power in its second weekend at North American box offices, collecting $57.3 million in ticket sales and remaining the No. 1 movie in cinemas, according to studio...

Strong audience scores and good reviews should help propel the $225 million-budgeted “Superman” toward profitability in the coming weeks.