Suddenly Mary was created in 1990.
No, the word 'suddenly' is not a verb; suddenly is an adverb, a word that modifies a verb (suddenly thought, suddenly appeared).A linking verb acts somewhat like an equals sign, the object is a form of the subject (Mary is my sister. Mary=sister); or the subject becomes the object (Mary felt cold. Mary->cold). The adverb 'suddenly' can modify the linking verb: Mary suddenly felt cold.
Suddenly I See was created in 2004.
Suddenly Strange was created in 1997-09.
Suddenly at Midnight was created on 1981-07-17.
Suddenly Susan was created on 1996-09-19.
Suddenly There's a Valley was created in 1960.
Suddenly - Arrogance album - was created in 1979.
Suddenly Single was created on 1996-07-01.
Suddenly Human was created on 1990-10-28.
Suddenly Naked was created on 2001-09-08.
Suddenly Yours was created on 2010-10-19.
Suddenly - Sean Maguire song - was created in 1994.