While I could not care less about Luke and Laura from General Hospital or Mrs. Chancellor from Young and the Restless, getting together all of Erica Kane's husbands on one stage might qualify as one of the television events of the year.

For your reference, here's Wikipedia's list of Erica Kane's marriages from All My Children, both valid and invalid (because her divorce to Adam Chandler hadn't actually been finalized at the time, obviously):

Jeffrey "Jeff" Martin (divorced) [1971-1974]
Phillip Brent (divorced) [1975-1976]
Thomas "Tom" Cudahy (annulled) [1978-1981]
Adam Chandler Sr. (invalid divorce) [1984-1992]
Michael "Mike" Roy (invalid) [1985]
Travis Montgomery (invalid; first time) [1987-1989]
Travis Montgomery (invalid; second time) [1990]
Adam Chandler Sr. (valid divorce) [1991-1992]
Dimitri Marick (divorced; first time) [1993-1994]
Dimitri Marick (divorced; second time) [1994-1996]
Jackson Montgomery (divorced) [2005-2007]