Antonyms of adj unreleased

1 sense of unreleased

Sense 1
unreleased -- (not (or not yet) made available for distribution or publication; "someone leaked the unreleased announcement"; "a film that remained unreleased for years")

INDIRECT (VIA suppressed) -> publicized, publicised -- (made known; especially made widely known)

Similarity of adj unreleased

1 sense of unreleased

Sense 1
unreleased -- (not (or not yet) made available for distribution or publication; "someone leaked the unreleased announcement"; "a film that remained unreleased for years")
       => suppressed (vs. publicized) -- (kept from public knowledge by various means;)