Crisis of Infinite Episodes - Super Heroes Create a Villain Contest

Yes, by 1983 the Super Friends had become so associated with Saturday Mornings that they were natural pitch men (and women) for cereal. I guess because there were no new episodes of Super Friends that year, the heroes had some free time to shill cereal.

Onscreen History of Icicle

One of the original "cool guys," Icicle was introduced in 1947's  All-American Comics #90 and frequently squared off against the Justice Society of America.