If you compare GOTG to the old Saturday movie serials of the 40s and 50s, you will find that the tone, pacing and character beats are almost identical. And this movie, more than any other Marvel film, showcases the studio's ultimate aim: to recreate the Saturday morning serial vis-à-vis the revived studio system. Plugging GOTG in where they did is actually rather brilliant because its the perfect engine to power things to the next level, and the 80-90m OW is the audiences stamp of approval on the approach.