As of now the attack seems to have been thwarted with all platform servers back up and running. EA recently revealed 3.5 million have subscribed to Battlefield Premium.
"The current BF3 and Battelog outages are a result of activity that appears to be aimed at overwhelming our game servers," the official Battlefield account.
Battlefield 4 is expected to be launched October 29th this year, although EA is yet to make it official. Check out the trailer below for 17 minutes worth of Battlefield 4 gameplay.