I like Dole Whips as much as the next person, but I kind of doubt that will be the next pin. Dole sponsers the Tiki Room, but in order to get something that's copyrighted to someone else and put it as a pin in their free virtual game might take more effort than it's worth for them. You have to remember that while Dole Whips are in the parks, they're property of Dole and are also at their factory in Hawaii.
It'll probably be a turkey leg next.