Panny, I remember the Battery Park show last year, but I do not recall it being advertised that way. That show was actually the kickoff for the tour.   It might have been that someone in the park commission misinterpreted the show that they were presenting in a press release.   

As far as I am aware, Arlo never had any intention of performing the entire album since the anniversary was for the incident which took place in 1965. The album came out in 1967.