Okay...now for the spoiler answer.
In Guardians you have a hero (Star Lord) who doesn't know who his dad is, gets thrown into a conflict bigger than himself, defeats the minor villain (Ronan) and there is a bigger villain pulling the strings (Thanos). Oh...and it takes place in space.
In Star Wars: A New Hope, you have a hero (Luke) who doesn't know who his dad is, gets thrown into a conflict bigger than himself, defeats the minor villain (Vader) and there is a bigger villain pulling the strings (The emperor). Oh...and it takes place in space.
That's about where the similarities end. I find it interesting he even drew that comparison because the differences drastically outweigh the similarities.