Hi Gang,
I believe Hanna-Barbera may have been the studio to provide the USA Network with the animation services for the bumper of the ensuing station's "Cartoon Express" block (the 1982-88 version), if I am not mistaken. The animation (especially of the girl on the motorboat) looks very H-B-esque (not to mention the appearances of some of H-B's own stars within the bumper, such as Yogi and Boo-Boo Bear which were added circa 1986). What good times those were that we miss now ...
Also, who did the background music for the 1982 CX bumper? It sounded very generic with that hard-rockin' electric guitar.
~Ben E. (RetroBen81)