4. Dont Micromanage Too Much
As mentioned earlier, Edgar Wright walked from Ant-Man because of creative differences. Jon Favreau, arguably the most important influence on the MCU since he set the tone with the first Iron Man movie, also left the series he started because of battles with executives. Judging from the lackluster reaction to Iron Man 3, we can kind of guess at what some of these battles were about (Tony needs a kid sidekick!). The Marvel movies and shows perform best when the creators are free to bring their vision to life. The first Thor movie was well received and felt like a breath of fresh air for the superhero genre, especially after clunkers like Green Lantern from DC/Warner Bros.; but when they ripped apart Thor 2 in order to accommodate more screen time for Loki, the franchise suffered so much that Thor 3 was chosen to be delayed in the shuffle necessitated by returning Spider-Man to the MCU. Speaking of DC - just a couple years ago when they launched the New 52 line of comics, there were many reports of creators being pushed around by ever changing editorial mandates and forceful personalities. Meanwhile, Marvel was basically letting their creators run wild as long as it sold and it gave us titles like Hawkeye, Moon Knight, and She-Hulk - books that all seem to operate independently of the larger universe itself. Just like in print, Marvel should let creators do what they do and only rein them in when its absolutely necessary.