>>149141550GI Joe keeps getting pushed because there's still a present demand for military fiction, the problem is that Hasbro doesn't really get that popular military fiction (at least, when it is sold next to giant robots fighting in a war) is revolving around stuff like Resident Evil, Call of Duty, and Metal Gear Solid, and adjacent genres like zombie or survival/apocalyptic fiction. It's sort of why Marvel doesn't know what to really do with SHIELD anymore either. Nobody in charge of the geek franchises knows how to sell military fiction without regurgitating what they grew up with, which is no longer relevant to the zeitgeist.
It's like how modern James Bond isn't really a big hit when compared to Austin Powers and everything that came after it. Certain genre examples in spy and military fiction are too fixed on a certain point in time rather than adapt to an ever-changing culture.