A) The theory that Bonkers was supposed to be a Roger Rabbit cartoon have been officially debunked. It was inspired by RR and nothing more.I've noticed that the animated series with the most interesting concepts/novelties always get pulled well within their first season, like Disney's Raw Toonage on CBS, which only lasted 12 episodes... Raw Toonage was basically a cartoon anthology hosted by classic or moderately well-known Disney characters like Sebastian the Crab, Ludwig von Drake or even Don Karnage. Each episode consisted of 3 shorts featuring completely new characters like Bonkers (who later got his own show, originally to be a Roger Rabbit animated series that fell through).
B) I wonder how much of Raw Toonage was perfectly thought out. Seems the main point was to give Bonkers street cred as a toon (the concept for his police comedy show came before the cartoon shorts, the shorts were essentially to promote the character). Marsupilami was destined for his own show next season (and something tells me Raw Toonage was the stop gap concept to promote that guy as well)... which leaves the TV show parodies. I'm almost entirely convinced that at least some of these were cobbled out of unused concepts from Disney's unrealized Bullwinkle revival. The Robin Hoof segment is a dead give-a-way. Add a popular Disney character to host the show and get kids to watch, and you've got a show that was made to market/introduce 2 other shows. Once Bonkers and Marsupilami became their own series, Raw Toonage's usefulness expired.
Quack Pack isn't exactly a show that was well liked. From what I understand (trying hard not to believe everything you read on the internet), the original concept was a sequel series to Ducktales, with Donald's Naval service over, and Scrooge relinquishing the nephews back to him to see how responsible he is to inherit McDuck Industries. The All Ducks on Deck episode stands as the only evidence, and Admiral Gribbitz was replaced by a Jim Cummings voiced expy with a different name and slightly different character design. Then someone said, nah, and made it more like Goof Troop, but with Donald. Suffice to say, some really sour people out there hated the show, and it never saw the daylight past those episodes, even though the show is admittedly pretty good.And then there was Quack Pack on The Disney Afternoon (and later Toon Disney) which only lasted about 39 episodes. The show centered around Donald's nephews Huey, Dewey and Louie as teens living with their uncle. Although it starred several well-known Disney ducks like Daisy and Ludwig von Drake, the show took place in a completely different Duckburg that included no references to Scrooge or his money bin, and that human characters lived in alongside ducks and dog-faced characters common to the common Duckburg universe.