LOS ANGELES — “Tron: Ares” powered up the box office grid in the top spot this weekend, but Disney’s third entry in the sci-fi franchise fell short of expectations.

What You Need To Know • "Tron: Ares" has powered up the box office grid, taking the top spot this weekend • Despite some favorable reviews, Disney's sci-fi film fell short of expectations, earning $33.5 million • "Tron: Ares" was packed with action and nostalgia, but it wasn't enough to draw big numbers across more than 4,000 theaters • “Roofman,” which starred Channing Tatum and Kirsten Dunst in the blue-collar dramedy about a construction worker trying to rebuild his life, opened in second place with a modest $8 million debut

Despite some favorable reviews — including a three-out-of-four-star one from The Associated

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