Antonyms of adj unannounced

1 sense of unannounced

Sense 1
unannounced, unheralded, unpredicted -- (without warning or announcement; "they arrived unannounced"; "a totally unheralded telegram that his daughter...died last night"- M.A.D.Howe)

INDIRECT (VIA unexpected) -> expected -- (considered likely or probable to happen or arrive; "prepared for the expected attack")

Similarity of adj unannounced

1 sense of unannounced

Sense 1
unannounced, unheralded, unpredicted -- (without warning or announcement; "they arrived unannounced"; "a totally unheralded telegram that his daughter...died last night"- M.A.D.Howe)
       => unexpected (vs. expected) -- (not expected or anticipated; "unexpected guests"; "unexpected news")