Robert Bowling aka fourzerotwo the Creative Strategist at Infinity Ward has recently revealed that Activision is “discussing” adding new game modes into Modern Warfare 3.
Bowling revealed the news on the social networking website Twitter when asked about having hardcore game types added into Call of Duty: Modern Warfare 3 by commenting, “We’re discussing some additional modes now, I’ll let you know when you can expect that.”
So it seems that at least a couple of hardcore modes will be added as it is unlikely they will release a completely new game mode.