Did anybody consider Kawhi Leonard a star before the Spurs won the title and he won Finals MVP?
That's because he wasn't, by any objective measure. It's not team success that made him, it was his increased role.
Did anybody consider Korver or Teague stars before the Hawks emerged as one of the dominant teams last season?
No. And they still don't (consider them stars, that is). Especially Korver. But I'm guessing you just have to put someone on the ASG ballot, so there's that.
Was anybody considering Deandre Jordan a star before Chris Paul showed up and turned the Clippers into a Western Conference force?
See notes on Kawhi Leonard.
Would Draymond Green be considered anything more than a good role player if the Warriors never came out and dominated the way they did last year?
Still not really sure why anyone considers Draymond Green anything other than a good role player. I'm guessing is the huge contract, and the unhealthy fixation that some of the CB residence had on signing him.