Battlefield Hardline is coming out on March 17. Proably the highest-profile release in the first quarter. Whoever gets the marketing rights(and bundles!) will have a big advantage.

So who do you think it is? Microsoft or Sony?

Sony seems to have the marketing rights, every announcement and trailer for BF has always been in a Sony Show, E3 and PSX comes to mind. Also if the trailer has ever ended with the Playstation, Greatness awaits Logo than that's a Sony marketing deal right there.

It's Sony. Another game that messed with their plans for the holiday due to being delayed.

Pretty sure it's Sony.

It's Sony, it was at their E3 press conference and they also got the Hardline beta. I don't know if PlayStation is getting any exclusive content.

Sony has the rights, for reasons already mentioned.

Has it? I haven't seen any.

EA sided with Sony years ago.
Activision with Microsoft.

So come March, Sony is gonna have an advertising blitz with Battlefield, Bloodborne, and Final Fantasy (which is classically more of a PlayStation title anyway.

Nope. They just side with whoever opens the checkbook and writes the bigger numbers. Sony paid big for Destiny (Activision) & Microsoft probably paid bigger for Titanfall (EA).