I can't see this being any bigger than MS getting exclusive/time exclusive dlc if true, EA is to big allow themselves to lose potential money on the PS4 if their titles were to go exclusive; and it would look silly for MS if it didn't pan out for them.
and if it were time exclusives; i really wouldn't mine, if PS4 owners get all the added in bonuses like ME2 then hey it's a win for PS4 owners.