The artist, theorist, and philosopher Guy Debod, the founder of the Situationist International had explored these ideas before Godard in various anti-capitalist techniques, such as the idea of detournement. Very similar to the Duchamp's idea of the readymade, Detournement was the explicit idea and intention of taking pre-existing works of art and altering it in order to create a new meaning. As detournement takes all of popular culture and turns it on its head, it intentionally diverts the original meaning in order to critique the dominant system of society, as Debord thought. Through his writings, Debord would return to many philosophers and theorists, just as Godard does in his films.
Godard as a Situationist filmmaker is a nice idea, but in the economics of it all, I think it would make Debord cringe in his grave. For situationist film we can see Debord's own examples.