The Super Mario Galaxy Movie's record-shattering $131.7 million domestic opening on April 1, followed by sustained weekly grosses exceeding $60 million through mid-May, has locked in its position as the clear April 2026 release leader. Strong family audience turnout, premium format premiums, and franchise momentum created an insurmountable gap over later April entries like the Michael Jackson biopic Michael, which opened to $97 million but trails significantly in cumulative domestic totals by the May 31 cutoff. Niche limited releases such as The Whistler register negligible earnings. An upset would require an unprecedented late-May surge from Michael or a sharp drop-off for the Mario sequel, neither of which aligns with current tracking or historical patterns for similar animated blockbusters.