Instead of reading about Will Smith and his shameless plug for Converse, I want to see Buffy characters inserted into the storyline. The characters won't know each other from the Buffyverse but should still have the same personalities that we know and love.

-Buffy-bot must play the part of Sonny.

Otherwise, the rest of the cast is up to you. Let the Buffy characters take the story to new places. Would they do things differently than the original story (er, original re-telling) dictates? Just have fun with it!