Depends if we're talking revenue? I think Sony has the best chance. Hardware units? Nintendo has the best chance with Switch, 3DS/2DS, and NES/SNES/N64 classics out simultatneously. Between just Switch, PS4, and XB1, probably a toss up between PS4 and Switch. If Pokemon and Smash are both released between Sept-Dec, that's a huge juggernaut there.