There will be 2 free screening events of Superman/Batman Apocalypse at the Paley Centers in Los Angeles and New York, on September 21st and 23rd.
After the Screening will be a Q&A with the filmmakers and members of the voice cast who will be announced when they are confirmed.

Tuesday, September 21, Paley Center in Los Angeles (465 North Beverly Drive in Beverly Hills)
5.30 p.m media interviews
7.00 p.m screening

Thursday, September 23, Paley Center in New York City (25 West 52nd Street)
5.00 p.m media interviews
6:30 p.m. screening

Tickets will be distributed on a “first come, first served” basis. That means, if you want to have a ticket for the LA event,
simply RSVP via mail to SupermanBatmanLA@gmail.com.
For the NY event to SupermanBatmanNY@gmail.com.

Source: ugo.com