Okay, maybe my explanation was a little off, here is an explanation from newsday.com

Super delegates were created as part of the Democratic Party reforms after the debacle of 1972, when a too-liberal candidate, Sen. George McGovern, made it to the head of the ticket. The reforms emphasized the proportional allocation of delegates in primaries and the selection of super delegates who could provide the ballast needed in close contests or could guide the party away from a disastrous choice. They were to be "a safety valve," as one super delegate put it recently.
So the super delegates had more uses than just one specific one.