The event will be held at the Nittany Sports Centre and is set to feature comics, action figures, sports cards, celebrity guests, and more.
Limitless is partnering with special interests THON org Atlas to put on the event.
35-year-old King spoked to a crowd of nearly 9,000 students and community members about voting rights and the fight for civil rights in 1965.
The former Kent State standout has up to two years of eligibility remaining.
Stubblefield served as Penn State's wide receivers coach for three years.
A penalty-heavy second period by the Nittany Lions led the Spartans to victory.