Someone is auditioning off a few sets of annotated WB cartoon dialogue sheets -- dialogue-only scripts used for the voice recording -- and from one of them, I learn that the mid-'50s cartoon "Wideo Wabbit" was originally supposed to be titled Omni-Bunny.
I know the titles of these cartoons don't really matter, but I still enjoy learning about alternate titles. Like when "Birds Anonymous" was announced on the scoring track as "Tweety-totaler."
These sheets seem to have been prepared for Mel Blanc, since they only include the dialogue spoken by his characters (Update: Sorry, my mistake: the Elmer dialogue is there, but on a separate sheet) -- though in this cartoon, the Groucho and Carney impressions were in the end done not by Blanc but by Daws Butler. The other cartoons available in this form are "Good Noose," "Pre-Hysterical Hare," "Daffy's Inn Trouble" and "Weasel While You Work," all McKimson cartoons from the late '50s or early '60s.
Additional bit of trivia: I believe "Wideo Wabbit" was the last cartoon where Carl Stalling used his Bugs Bunny theme, "What's Up Doc?" The song was in and out of WB cartoons over the years. Stalling didn't seem to be a big fan of using the same theme for a particular character repeatedly, as Disney did for Donald and Goofy. (And Warners probably wouldn't have wanted an original theme used too often, since that reduced the opportunity to plug WB-owned pop songs.) While he used "What's Up, Doc?" in a few Bugs cartoons in the mid-'40s, it wasn't until 1950 (with the eponymous cartoon where the song was sung all the way through) that he and Milt Franklyn created a new arrangement, complete with fanfare, that introduced most Stalling-scored Bugs cartoons from 1951 to about 1954. Though just as Scott Bradley would sometimes put his Tom and Jerry theme on hold if the setting or subject matter called for it, as in the Mouseketeers cartoons, Stalling would use something other than "What's Up, Doc?" if a different song seemed necessary.
Anyway, after the 1953 shutdown, Stalling used the fanfare a few times, but "Wideo Wabbit" appears to be the last use of the song itself. That was pretty much it for LT/MM characters with theme songs, except for Foghorn Leghorn, who had firmly established the public-domain "Camptown Ladies" as his theme. (Also, Stalling and Franklyn occasionally re-used Smetana's "Dance of the Comedians" in the Road Runner cartoons, but it never really became a full-fledged theme song for the series.)