From Xfire:
“Take-Two CEO Strauss Zelnick, in a one-hour earnings call this week, said “The folks at Rockstar Games intended to create a powerful single-player experience and a story-driven experience… and then developed in addition, a massive multiplayer opportunity over the past years.”
This could mean that Rockstar Games is going to focus on single-player games and then look to expand them with multiplayer options. Of course though, it would be very easy for them to focus on the opposite, considering the massive run away success that GTA Online has had.”
Source: N4G PC GTA 5 Developer Rockstar Games Intended To Create Single Player Experience, Says Take Two CEO