epic film; big-budget movie
Refers to a movie produced on a grand scale with a large budget, often featuring spectacular visuals, a sweeping story, or an all-star cast.
Several big-budget movies will be released during this summer vacation.
He became famous as a director of epic films.
大作 is a broader term for any large-scale work (novel, film, game, etc.), while 大作映画 specifically means a large-scale movie.
超大作 is an even more emphatic term for a blockbuster or mega-hit, often used in promotional contexts.
Compound of 大作 (large-scale work) and 映画 (movie). The exact historical derivation is uncertain, but the term follows a common pattern for describing film genres by scale.