There's no way that the MCU would change anything this important in the comics. But then again, what do I know, they already changed Ultron's creation and back story so Tony Stark could have meaning in the newest Avengers, so any changes are possible. That being said, there's no way that cocoon was a throwaway gag instead of an easter egg. It was there for a purpose to most likely bring in Warlock's character but making him a father is illogical. If you remember when Starlord was captured in the movie, they commented on him being a prince. Since we all know who his actual father Jason is, its best to assume this line in the movie is a hint for that famiky reunion to take place, not a God who came out of a cocoon.