Union files suit against local school board

The recent school board townhall sponsored by the Chamber of Commerce gave no indication that there was any impending legal action by the union. I detected some ruffled feathers about policy vs contract requirements but nothing of this magnitude. Was this lawsuit intended to be hidden from the taxpayers until it was too late for them to be part of the discussion (perhaps in the hope that it would frighten the board into giving in?? or am I reading too much into this?) As a local taxpayer, I vote for a board to represent me in hiring and firing school personnel and promulgating school policy. If there is a hidden agenda (like something not discussed at a public forum??) I want to know who was hiding it and why (whether this is the union or the board).