Well, Bleeding Cool was right.
Jason was only there to get clowned by The Vigil and show they mean business.
And Joker threw away again Jason and Bruce being on good terms so Jason could get chased away from Gotham again and get captured by the police again.
spoilers:end of spoilers
And he gets fooled into thinking he killed Joker by shooting Clayface pretending to be Joker
Meh