If a recent leak is anything to go by, GTA Online will soon be seeing an influx of new content.
Ever since the Lowriders update was foretold by dataminers with surprising accuracy, and their predictions turned out to be correct in the case of the Halloween DLC right after, the community's faith in leaks has returned.

Some time ago we reported on a leak of massive proportions, which saw code and assets from upcoming DLCs released to the public earlier than intended. At first, it seemed as if the initial leak would be debunked. However, a followup with more content proved to be too extensive to be a fake.
The two main updates that fans expect to see soon are the Christmas DLC and the second part of the Lowrider update. Content from both was first shown off in the massive leak, including the remainder of the vehicles linked to the initial "LOW" reference in the code which kicked off all that Lowriders speculation way, way back.