The Golden State Warriors have pushed back the opening of their new arena in San Francisco to 2019.

The Warriors claim the CEQA (California Environmental Quality Act) lawsuit is a last resort brought on by what they are calling an “anonymous SuperPAC” despite EIR (environmental Impact Report) approval by the San Francisco Board of Supervisors.

The group that filed the lawsuit— the Mission Bay Alliance— has responded calling it a “victory for opponents of the Warriors ill-conceived” complex.