Crews taking a Sidekick in the Boss role now change that Sidekick's $ cost to $0. The new Boss wont gain the Leader abilities (ie Inspire), but will be worth Leader VP's in the game.
An example of how this affects is that Scarecrow crews led by Arkham Knight now get to spend his $500 cost elsewhere, similarly Law crews led by Gordon and even Batman crews led by the newly released Cyborg.
This is excellent timing to be in effect for the upcoming BMG tournament in Loughborough this month, it doesnt really impact my crew of choice (League of Shadows) but I expect to see some interesting new crew compositions coming through.
As alway the latest updated info is shown in red, I recommend anyone that plays the game with any regularity to keep a copy to hand for your games (I usually keep a printed copy in my hardback rulebook).