There won't be a MK:SM2. They already said what the next game will be about... In one of the MK:SM interviews. The next one will be based on a character (forget who), then MK4 and then the next will be set in the future. Unless they change their minds.
i'd love to see sumthin from the point of the shirai ryu, at the time of MKM-SZ, with the decimation of the ranks by quan chi, and the aftermath of the death of scorpion. with all the lin kuei (subby 1 and 2, smoke, sektor, cyrax, frost, shujinko to a degree, noob) its about time we saw another shirai ryu