What if William Hanna and Joseph Barbera worked for Warner Bros. after leaving MGM and retained the rights for Tom and Jerry

What if William Hanna and Joseph Barbera worked for Warner Bros. after leaving MGM and retained the rights for Tom and Jerry? Well, here's what might happen.

History
Following the Metro-Goldwyn-Mayer cartoon studio closedown in early 1957, William Hanna and Joseph Barbera, contemplating their future while completing the final Tom and Jerry cartoons, began producing animated TV commercials. During their final year at MGM, they developed a concept for an animated TV program about a dog and cat in various misadventures. After they failed to convince the studio to back their venture, Hanna and Barbera were convinced by fellow animators Friz Freleng and Robert McKimson to join the Warner Bros. Cartoons unit. As a result, both producers signed a deal with Warner Bros. to finance their projects and as part of the deal, the production rights for Tom and Jerry (created by the duo) and Droopy (created by former Warner Bros. animator Tex Avery) were acquired by the studio, forming Hanna-Barbera Productions as a separate unit of Warner Bros. Pictures. The Tom and Jerry and Droopy series were integrated in the Looney Tunes/Merrie Melodies franchise (with their shorts being reissued as Looney Tunes/Merrie Melodies shorts), while Spike and Tyke star in their own shorts, while Tom and Jerry star in cartoons without each other (with Tom being an antagonist for some other characters at most cartoons), resulting on Hanna and Barbera starting to work on the series, with new characters like Huckleberry Hound, Pixie and Dixie, Yogi Bear, etc. being part of the Looney Tunes/Merrie Melodies cast, as well as producing non-LT/MM TV shows as The Flintstones, The Jetsons, Top Cat and Scooby-Doo.

Classic shorts crew

 * William Hanna - Director
 * Joseph Barbera - Director
 * Chuck Jones - Director
 * Friz Freleng - Director, producer in the DePatie-Freleng shorts
 * Robert McKimson - Director
 * Mel Blanc - voice of Tom Cat, Jerry Mouse and Tyke Bulldog during the Warner Bros. era
 * Bill Thompson - voice of Droopy and Touché Turtle
 * Daws Butler - voice of Spike Bulldog, Butch Cat, Yogi Bear, Huckleberry Hound, Snagglepuss, Augie Doggie, Reddy, Hokey Wolf, Snooper, Blabber, Quick Draw McGraw, Baba Looey, Wally Gator, Dixie and Mr. Jinks
 * Don Messick - voice of Boo-Boo Bear, Ranger Smith, Ruff and Pixie
 * Doug Young - voice of Doggie Daddy and Ding-A-Ling Wolf
 * Jimmy Weldon - voice of Yakky Doodle
 * Alan Reed - voice of Dum Dum
 * Frank Welker - voice of Tom Cat, Jerry Mouse and Tyke Bulldog in the 1990s theatrical shorts revival
 * Greg Burson - voice of Spike Bulldog, Butch Cat, Yogi Bear, Huckleberry Hound, Snagglepuss, Quick Draw McGraw, Wally Gator and Mr. Jinks in the 1990s theatrical shorts revival
 * Neil Ross - voice of Baba Looey in the 1990s theatrical shorts revival
 * Patric Zimmerman - voice of Dixie in the 1990s theatrical shorts revival

Looney Tunes

 * TBA (19??, starring Bugs Bunny and Elmer Fudd)
 * TBA (19??, starring Daffy Duck and Porky Pig)
 * TBA (19??, starring Sylvester and Hippety Hopper)
 * TBA (19??, starring Wile E. Coyote and the Road Runner)

Merrie Melodies

 * TBA (19??, starring Bugs Bunny and Yosemite Sam)
 * TBA (19??, starring Sylvester and Tweety)
 * TBA (19??, starring Foghorn Leghorn, Barnyard Dawg and Henery Hawk)
 * TBA (19??, starring Pepé Le Pew and Penelope Pussycat)

Trivia

 * Due to Warner Bros. acquiring the character rights for Tom and Jerry, the Gene Deitch-directed shorts for Rembrandt Films ended up to be made in this alternate universe at Warner Bros. Cartoons by Hanna, Barbera, Jones, Freleng and McKimson, retaining the duo's original style.
 * In Tiny Toon Adventures, some Acme Looniversity students with these characters as their mentors are:
 * Widdly Bear (voiced by Rob Paulsen) - Yogi Bear and Boo-Boo Bear's apprentice.
 * Sawyer Puppy (voiced by Frank Welker) - Huckleberry Hound's apprentice.
 * Toothy Tiger (voiced by Jess Harnell) - Snagglepuss' apprentice.
 * Tyler Kitten (voiced by Frank Welker) and Jessie Mouse (voiced by Tress MacNeille) - Tom and Jerry's apprentices.
 * Shooter McDavis (voiced by Charlie Adler and later by John Kassir) - Quick Draw McGraw's apprentice.
 * Daphne Puppy (voiced by Kath Soucie) - Droopy's apprentice.
 * Trickie (voiced by Frank Welker) and Trixie (voiced by Candi Milo) - Pixie and Dixie's apprentices.