Sophomore slump is really just a jinx, but since it's powerful enough to have its own Wikipedia page, any cause for concern is understandable.
The Warriors will have three "sophomores" expected to contribute in Klay Thompson, Charles Jenkins and to a lesser extend Jeremy Tyler next season.
Big things are expected from Thompson as he attempts to take over for Monta Ellis for a full season. He was thrown into the fire last season, so he didn't really have the time to grasp starting at the NBA level. Plus he only started 29 games last year. Next season will bring higher expectations and a lot more pressure to deal with.
Jenkins, if he is going to be the primary backup to Curry, has a lot of pressure on his shoulders as well. Curry can go down at any moment, which means Jenkins would be expected to guide the Warriors to the playoffs. A lot for any second-year player to deal with, let alone a second rounder in his second NBA season.
Tyler still has a long way to go, but he was playing well in the final weeks of last season and the Warriors would love to use him off the bench consistently as he (hopefully) continues to improve.
These three have a lot to deal with and I hope they all play well next season because it feels like I just jinxed them all!