To be fair it was quite obvious that Sony was aiming for the fighting Genre. They Got:
1)Injustice: God Among Us Next Gen edition being a PS4 only
2) Guilty Gear XD being a Playstation exclusive
3) Street fighter 4 on the PS4 plus Stret fighter V being console exclusive to the PS4.
4) Skull Candy 2
5) Godzilla coming this month (does it count as a fighter? i mean it IS Kaijus or Giant monsters fighting eachother)
6) And they have the Marketing Rights to Mortal Kombat X (I believe)
Really the only reason why PS4 wouldn't be the home for fighting games is because Nintendo has smash and Xbox has Killer instinct.
And To be fair they are the home for most Game genres except Maybe FPS but with Black Ops 3 being marketed by Sony that's about to change.