Board Thread:General Discussion/@comment-1210805-20130313135030/@comment-1672596-20130313150002

Evil Tim wrote: Doubt it, Ground Zeroes is supposed to be a sequel to Peace Walker and the general trend seems to be for the Big Boss games to not get numbers.

Metal Gear Solid 3 was a Big Boss game, and Peace Walker was at least initially considered to be Metal Gear Solid 5, which was even reflected in some early versions of the title. Nonetheless, we should wait and see what happens. Since the article implies that they're covering Phantom Pain today, we'll find out soon enough any details on the game.