i think that now Saskue has the EMS he will either go:
a) Power crazy and try to kill everyone by starting a new Akatsuki (new naruto series) (obv failing in the process)
b) Will see that Tobi has manipulated him and turn against him when he is weakest and both die
my personal thoughts
all theories welcome guys 
a) Power crazy and try to kill everyone by starting a new Akatsuki (new naruto series) (obv failing in the process)
b) Will see that Tobi has manipulated him and turn against him when he is weakest and both die
my personal thoughts