Here are your "super features":

• Masks – New player masks with unique gameplay benefits tied to the theme of each mask.
• Gun Bench – Provides players with the ability to visually customise their weapons and track their kills per weapon.
• Competitive Play – Support for competitive play through Battlefield Hardline Premium-access only tournaments and ladders.
• Legendary Status – Provides replayability of the entire progression system.

 
Here, meanwhile, are the planned DLC packs:

• Battlefield Hardline: Criminal Activity – Players have to make a name for themselves in fast-paced, highly-destructible new maps littered with small-time crime jobs. Available summer 2015.
• Battlefield Hardline: Robbery – Take down the opposition head on and progress through key locations with major cinematic action. Available summer 2015.
• Battlefield Hardline: Getaway – This is frantic, high-speed chases that immerse players deeper in the heist. Available fall 2015.
• Battlefield Hardline: Betrayal – There is a rat in every operation and players will have to find out who to trust. Available winter early 2016.

And the additional extras? That'll include priority position in server queues, new personalisation options, double-XP events and 12 gold Battlepacks.
 
Battlefield Hardline is due out on March 17.
 
Source