Assuming the F14 will be done at the same level of the MIG21... I hope we have an opponent with the same level of detail and to me the actual F15/SU27/MIG29 are not in the same level.
Not to mention that and f14 will never go against f15 or f18 unless they plan to simulate Iran's F14A with of course with some modifications in the electronics. (Iran / Iraq)
So far the the only series that has same level of opponents are the WWII with P51D /FW190 and 109. Soon we will have the MIG 15 against Sabres & P51d.
To me it would really nice to have M III, F4, F104s, F100, F1, MIG23.
But I know I don't represent the majority.