He should have a good chance to start again. Johnson and Henry are the only SF's on the roster. I'm sure Young and Kobe will play together a lot, but neither is a natural SF and Young is a good guy to bring off the bench for instant offense.
Wes quietly had a pretty decent year last year. 9 ppg, 37% from 3, over a block and a steal per game and he's a pretty good and versatile defender. He just has to play with energy consistently. There's no reason he can't stay in the league for a long time, he has all the tools to be a good defender and 3 point shooter from the SF spot.