At the moment it's just a rumor, but according to what emerged from the testing phases of Battlefield 4 looks like the title SAYS could allow lots of over 70 players, more than the already announced 64 + 2 (the two possible Commanders). Below more details.

The rumor comes from a source of BF4Central site that the developer is currently testing a greater number of players in the title; This could be justified by simple mathematical logic, calculating that each faction consists of 32 players and that each faction has 5 people team is easy to guess like 2 people to remain "Sun" faction; the increase to 70 players, and then to factions from 35, would in fact have qualified for team 7. Waiting for further details or information please stay with us.