They must not have got the message that they were co-conspirators.  Hubris and arrogance are an amazing thing.  Now they will be exposed more.  They should be folding their tents and get on with leasing out or selling that building (which I am sure they are doing, which is good.)  And maybe this is such a blow that they have no other choice but to sue. But if they do have a choice, I don't think this is a good move.  It's doubling down on what has proved to be a losing strategy:  going to court to fight it out.