It is not the longest wait, but it's still a nuisance and that issue like a cheap gimmick to encourage players for real money feels faster progress crystals. Such micro-transactions are always prominently during Iron Man 3, for example, when it comes to unlocking upgrades or new suits. Loops is possible, but it will take a long time to achieve. Remember to unlock all suits at once, it costs a more tears to my eyes $ 99.99.
As Endless Runner, Iron Man 3 is a mediocre record. Not terrible, but not worth mentioning. As the game by a huge movie, but it's a waste of a great franchise, and one that will inevitably disappoint.