I know that there isn't much chance of XBL-PSN play, but what about PS3-PS4 cross platform play?
I likely won't be getting a PS4 until late next year, so being able to play multiplayer with PS4 player from the PS3 would be a big plus point for getting the game.
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I think, down the road, that there will be cross platform. Look at cell phone games. Every single one is cross platform. Plus, there are a few games for consoles that already are.