Oppressor

The Rocket Bike (name currently unknown) is custom sports bike to be featured in the Gunrunning update for Grand Theft Auto Online.

Grand Theft Auto Online
It appears as a concept motorcycle with a large rocket booster mounted on the rear, similar to the Rocket Voltic, with wings on both the front and back. Small vents can be seen on the front of the bike.

The bike appears to have some sort of missile launcher on it.