Thanks to this theory, i will make my predictions soon on Naruto and Sasuke's power ups in the future. However, i have few questions regarding this theory.
You said with the Yin Sasuke possess and Senjutsu, he will awaken the Dojutsu. But Madara himself was said to be even more sinister and still than Sasuke, and the latter currently possess SM. Why didn't he awaken it then?
His eyes had already ascended to the Rinnegan via the complementing Yang of Hashirama's cells. The same thing would have happened if the Elder Son did that to his own brother. Adding Sennin Modo is just further amplifying his techniques. Sasuke getting such would alter his Mangekyou, as it is the only Dojutsu he possesses and he wouldn't have the Yang to get the Rinnegan, but rather massive Yin+Senjutsu, which is the base for this hypothesis.
When you are done making that theory, VM/PM it, as I would like to see what other members think Naruto and Sasuke will gain.