According to
IGN Pocket, the next iteration of MK games on the Game Boy Advance now bears the title of
Mortal Kombat: Deadly Revenge. The scheduled release of
MK:DR on GBA is this summer.
MK: Deadly Revenge will feature new levels and single player options, along with 4 player connectability with the previous MK: Deadly Alliance GBA version. Thanks to Forum member
DJ_Mo for the tip.