I don't think I'm going to. I just got the 7th badge on Pokemon Black yesterday and I have yet to get past the first town in Pokemon Sun. Too bad the only option for me is "I own a 3DS but i'm not a pokemon fan". I rode my bike to Gamestop for the Marshadow code.
After I beat Black, i'm going to jump ahead to Pokemon Black 2. I will probably at some point play Sun since I do have it.
I would rather play Cold steel 1 and 2, Digimon Cyber sleuth, and Deseiga 4.
Black 2 is 100x better than the last few Pokemon games released ---