Check out these cover scans of the Hanna Barbera titles I have in my collection.
There are even holiday annuals that are 10''x13'' in size.
Those "TV Stars" titles feature rare HB characters too. Who else has heard of Shake, Rattle & Roll?
Marvel Comics attempted to release other cartoon comics in the future such as all the titles in their "STAR Comics" line and also the quickly forgotten "Disney Afternoon" line.
If anything, Marvel should consider bringing back "Peter Porker: The Spectacular Spider-Ham".