The Phantom Pain is either MGS Ground Zeros or MGS5

[BenVTrigger]

Xxain said:
^ No its a ground zeroes trailer. The tagline to ground zeroes is "two phantoms were born" This trailer showcases the phantoms

See my first instinct was that it was Ground Zeros too but whats with Metal Gear Solid 5 being written in the title?  Did they change the name?