i don't think Stan will leave because Kenny was supposed to leave and so was kyle and its not the end of south park either Matt and trey have agreed to a contract that says they cannot end the season until 2013 : )
The scene where Stan sings about Wendy is actually in the South Park movie. ("South Park: Longer, Bigger and Uncut")
Stan has black hair.
Stan's name is Stanley Marsh.
Wendy is Stan's girlfriend.
The voice actor for Stan on South Park is Trey Parker.
Her name is Shelly
No, he isn't, but his friend Kyle is.
12 or 13
Bangladesh.
Red and blue
Stanley Marsh
Vietnam War