It's basically a massive cliche to say that 2015 has turned out to be the biggest year yet in the MCU. That makes it no less true. On the big screen, numerous characters were finally brought to life for the first time, including the Vision, Ultron, Scarlet Witch, Ant-Man, Hank Pym, Yellowjacket, the MCU's take on Quicksilver, and our future Wasp, Hope van Dyne. On the small screen, the Agents of S.H.I.E.L.D. have continued their adventures, introducing Inhumans, battling HYDRA, and traveling to another planet along the way, while Peggy Carter finally got a series all her own. Beyond all that, Marvel and Netflix took their first steps in bringing the Defenders together with the first seasons of Daredevil and Jessica Jones, which introduced their titular characters, their friends, and their enemies to widespread acclaim. With the airing of the midseason finale of Agents of S.H.I.E.L.D.'s third year earlier this week, 2015 has finally drawn to a close for the MCU. And before we begin looking ahead at what's in store for next year, let's take a spoiler-filled look back at everything we've gotten over the last year to see the best the MCU had to offer...