Canadian filmmaker Bryan Michael Stoller , a longtime friend of Michael Jackson 's, hasn't seen the upcoming biopic "Michael" ... but he tells TMZ he's got high expectations.

When we ran into Bryan in Studio City Monday, he told us he's only seen the trailer for the movie like everyone else ... but he already has a strong intuition for how his late pal would have accepted the film.

Bryan said having Michael's nephew Jaafar Jackson play him would have been enough to win him over.

But Bryan has reservations. He says he was surprised no one contacted him to answer questions about the King of Pop, since he was so close to the late pop star ... which raised concerns for him about the film's accuracy. Getty

One thing he hopes the biopic gets right is how much Michael cared a

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