The Marx Brothers movies played with the MGM “Leo the Lion” opening. A Night at the Opera had the three Marx Brothers (Zeppo was out of it by then, although virtually replaced by Alan Jones) “roaring” through the “Ars Gratia Artis” frame. the silent Harpo was supposed to reach into the film/foliage and retrieve his trademark horn to use.
They played with the logo in another film – normally the Lion is matte into the frame, but for this opening they actually had the lion behind a cutout, and after the roar the camera dollies around behind it, where you see Harpo with it.
MGM also “played” with the logo by having Tom of Tom and Jerry hissing through the opening instead of Leo
The Pink Panther, too:
Anticipating the "Matrix" opening the OP lists, in 1959 they surrounded the Leo the Lion with the same odd green used in the opening credits of **North by Northwest**:
For **The Fearless Vampire Killers** Leo morphs into a fanged vampire:
So MGM has been screwing around with its trademark logo, changing it sometimes to fit the movie, since the mid-1930s, long predating paramount’s Raiders of the Lost Ark.
By the way, Paramount replaced the m,ountain with Mt. Sinai in its opening for 1956’s The Ten Commandments