Rockstar Games has announced on its blog what content updates will be coming to GTA Online over the next few weeks. They stress that things may change, and they may even add some extra stuff.
The Beach Bum Pack: Featuring 4 new amazing beach fun vehicles, over 300 new items of incredible down tempo leisure wear and 2 new but not remotely relaxing weapons.
Capture the Flag: GTA Online’s take on the classic CTF mode including the ability to make your own using The Content Creator.
Heists: This update will introduce full-on cooperative Heist missions that will require careful planning, teamwork and sharp execution – along with the Heist Planning Board for your apartment.
The company says all these updates will be completely free, and they'll have more info on these and more content soon.