For the digital version of Metal Gear Solid V: Ground Zeroes, you will receive the same DLC as those with a physical code so long as you have your save data for Metal Gear Solid V: Ground Zeroes when you buy and start playing Metal Gear Solid V: The Phantom Pain you will get the same content!
You just need to have a save game for Metal Gear Solid V: Ground Zeroes and you’re ready to go when Metal Gear Solid V: The Phantom Pain comes out!
Go here for more information about what the DLC contains!
