Dice didn't pitch to EA until they were confident about the concept of Mirror's Edge 2 and actually had something to show them.
Via - Mirror?s Edge: DICE held off on pitching sequel to EA | VG247
“Not until we knew what we wanted it to be and felt comfortable we then pitched it to EA. Then usually when we like it, everyone else likes it,” Bach said, describing DICE as the “bad cop” in this scenario – which does have some up sides.
“Then again, we are the development studio with creative freedom, I would argue. We would not try to pitch something that we didn’t believe in, and that takes time. Sometimes you want something but you don’t really believe it will pan out that well.”
Via - Mirror?s Edge: DICE held off on pitching sequel to EA | VG247