What's Next: Borderlands

What would you want to see in a new Borderlands game?
 
 Personally I think there is only one way Gearbox can go with this franchise. I want to see four complately different characters in a completely different part on Pandora. The classes can stay but I think this is the only thing that can bring a fresh face to Borderlands.  I want four new adventurers with a totally new quest. Claptrap, Marcus and maybe Dr. Zed can stay. These are characters that are recognizable as part of the Borderlands world and have been established as transportable ( so a new environment would not pose a problem).  But bringing back Brick, Mordecai, Lilith, and Roland is not necessary. They've accomplished their mission and lived happily ever after. Gearbox needs to learn from the success of Left 4 Dead 2 and give us four new main characters in a new environment. 
 
What would you like to see? Do you agree with me? Do you think I'm completely crazy?