I think they should do a remake of RA1: Alternative semiserious 1950s with Stalin poised to annex Europe and Kane scheming the background.
The first game would depict events from 1955 to 1960. This alternative WW2 would have the western allies desperately defend against overwhelming soviet invasion much like as we saw in RA1.
The sequel would depict an alternative pacific war that begins 4 years after the end of the first war. The Japanese Empire dominates the pacific, China and half of the former USSR having grabbed all these territories as the British and the Americans were busy with the USSR.
The western allies and Soviet remnants go to war against the Empire. This game would totally revamp CnC naval warfare (think of Total War when it introduced naval warfare). This war ends in the early 1970s with an Allied invasion of Japan: setting the stage for Tiberian dawn.