Arnold posted the following video on Facebook announcing the event. Below you can also check out the 15-second Terminator Genisys teaser.
Update: The Terminator: Genisys trailer is now online and can be watched below.
Terminator Genisys has a July 1, 2015 release directed by Alan Taylor starring Arnold Schwarzenegger, Emilia Clarke, Jai Courtney, Matt Smith, Jason Clarke and J.K. Simmons.
Terminator: Genisys full trailer: