Tell WB you want to see Seasons 2-4!!
I know, money talks and an e-mail from a customer or two can't usually shake things up too much, but I'd say its still worth the 45 seconds it'll take.
Go here and tell them!:
http://www2.warnerbros.com/web/main/help/whv/customer_service.jsp
It's a darn shame that Seasons 2-4 could be contingent on how Season 1 sells, considering it was probably the worst of the 4.