User blog comment:RainingPain17/New GTA Online update revealed/@comment-25368842-20150603102955/@comment-25261281-20150603220846

Truth is Rockstar seems to forget GTA V and put all their stuff in Online. Conclusion: singleplayer is left behind. Why? Because in R*'s mind it is "ever1 playz online so lets do stuff 4 them". No, every GTA player doesn't fucking play GTA Online all-day. Therefore there is no justification for leaving GTA V behind while Online gets all the things, and online players are forced to buy a car to test it, as they cannot get it in SP beforehand.

With the Heists Update, all hopes for a SP DLC were lost.