Luke Fickell has not been fired as the head coach of Wisconsin, but Penn State took the astonishing and expensive step of getting rid of James Franklin. Since many analysts assume that by the offseason, Fickell will be gone at Wisconsin, too, there are some already thinking Franklin may be a fit for the Badgers.
The first credible speculation actually came before Franklin was even fired. Pat Forde of Sports Illustrated threw out the possibility last week. You can read that article here. But since then, more and more have thought Wisconsin could be a landing spot for Franklin.