Here's what I want to see in Black and White.
E4: Congratulations, you have beaten the Elite Four! You are now the Pokemon League Champion!"
Black: Srsly? I guess I'll walk into the Hall of Champions.
White: Hey, I just beat the Elite Four. Now I'm challenging you for your title.
Black: FUUUUUUUUUUUUUUUUUUUU
Heh, I hated when they did this in Pokemon Yellow. You got through all the way to Lance, beat him, and just when you thought you were done, your rival pops up.
Just cruel :<