The Fast franchise started off solid nearly 15 years ago solid opening right in the middle of summer 2001 with nothing really big in June that year besides Shrek making money, Swordfish and the others making decent to flop numbers. 2 Fast 2 Furious was at the starting point of the large amount of sequels being released in the summer back in 2003, but earned less than the original but was an overall profit for Universal. Tokyo Drift was at a point when we started seeing these Fast & Furious rip-offs like Biker Boyz and Red Line (both flopping), and also Tokyo Drift wasn't appealing to an audience because it felt like a reboot. Fast & Furious came out with sucessful timing, nothing big coming out around the spring of 2009 and bringing back the old cast. Fast Five was the beginning of Universal's strong marketing for the franchise, from its marketing(I think super bowl 45 had it advertised) to something different to its release date to having the addition of The Rock. Fast & Furious 6 had an excellent release date Memorial Day 2013, and the fun Super Bowl spot. Furious 7 had a good release date, and was released at a time when Paul Walker had passed away nearly 2 years before the release and its marketing with the cars in Abu Dhabi going into buildings. Part 8 is going to be one of those entries where it's going to decrease about $115 million less than the last movie. A perfect example for this would be The Dark Knight Rises. Spectre not so much, Spectre was a film that had marketing where it felt like "eh?" Compared to Skyfall.