The amount of misinformation around the BO1/BO2 PS4 ports is insane.
No, PS3 hackers are not going to invade PS5 lobbies.
No, a PS4 version would not be connected to PS3 matchmaking.
And no, Activision isn’t spending money on native PS4 ports just to recreate the exact same problems people are trying to escape.
That’s not how any of this works.