Battlefield 4 is the newest game that is being released in the Battlefield series. The game will be released on October 29, 2013 in North America and will be available on the new XBox One platform.
The current release date for Battlefield 4 for current-gen consoles is on October 13, 2013.
IGN Daily Fix - 2009 PS4 Release Date Xbox One Launch Lineup and Battlefield 4 Beta was released on: USA: 20 August 2013
It will be your choice if you should buy Battlefield 4. I would think on it before buying. Hardline is NOT DLC for BF4. It's a new release.
Battlefield 4 Divided We Stand - 2014 1-4 was released on: USA: March 2014
Bar Hunters - 2013 Battlefield 1-4 was released on: USA: December 2013
Battlefield Friends - 2012 Teamspeak 3-4 was released on: USA: 30 June 2013
Battlefield 4 Second Assault - 2013 VG was released on: USA: 22 November 2013
Battlefield 4 China Rising - 2013 VG was released on: USA: 25 December 2013
Battlefield Friends - 2012 Revive 1-4 was released on: USA: 6 April 2012
BattleField Detectives - 2003 Siege of Masada 3-4 was released on: USA: 2006
Battlefield 4 Divided We Stand - 2014 1-2 was released on: USA: March 2014
Battlefield 4 Divided We Stand - 2014 1-1 was released on: USA: March 2014