Prince’s death in Reykjavik, Iceland after a brief illness, announced by his publicists, brings to end a formidable career that also included such seminal stagings as “Kiss of the Spider Woman” (1993). His greatest achievements though, at least artistically speaking, were a series of collaborations with the famed composer Stephen Sondheim, including “Company” (1970), “Follies” (1971), “A Little Night Music,” (1973), “Pacific Overtures” (1976), “Sweeney Todd” (1979) and “Merrily We Roll Along” (1981). His last collaboration with Sondheim was “Bounce,” later retitled “Road Show,” which premiered at the Goodman Theatre in Chicago in 2003 and didn’t do well with critics, a reminder that even the Prince of Broadway sometimes struggled.