In a note to investors today, Creutz said GTAV will have a shorter sales tail due to "high gamer anticipation" and the launch of next-generation consoles in November.

The analyst is now modeling sales of 25 million units for GTAV in the game's first year. Based on the , Creutz said the open-world game is likely to have already sold at least 15 million units.

Take-Two has not disclosed specific unit sales figures for GTAV, saying only that the game has generated over $1 billion in global retail revenue to date. The game achieved this milestone faster than (15 days) and The Avengers (19 days).

By comparison, since the game launched in April 2008.

Creutz also said in his note to investors today that --due to launch on October 1--should offer "ample opportunities" for content packs and microtransactions over the next several years.

"Call of Duty generates several hundred million dollars per year in digital revenue, and we think GTA could do the same," Creutz said. "Success here would take significant pressure off of next year's as-of-yet undetermined title slate."

GTA Online is , though Rockstar Games has not commented on this yet.

According to Robert W. Baird analyst Colin Sebastian, GTAV is likely to be released on the Xbox One and PlayStation 4 in 2014 to "."

For more on GTAV, check out .