Existing production logos/idents

Today, me and my partner have been thinking about our own ident and production company that will be featured at the start of the trailer. Before we start thinking of ideas for our own idents, I feel it will be good idea to research popular and successful production companies already out there and try to look at those for inspiration for our own ident as they way they conduct and establish themselves is obviously very successful so I would like to create an ident as professional as those already out there.
Here are some examples of production companies and idents that are already established, successful and popular


     UNIVERSAL




WARNER BROTHERS


 WALT DISNEY PICTURES




 TWISTED PICTURES


 DREAMWORKS