Quote Originally Posted by rcam72 View Post
Prince's adaptation brings into question where the line between copyright infringement and fair use is.
Well, yes, that's why there was a lawsuit. The law itself doesn't specify very precisely where the line is; the question is settled in court (or out of court, as in the Fairey case).

I'm on the fence regarding wether or not his work can be considered original or not.
It's not really a question of originality. It's a matter of using someone else's work without permission. Fair use law recognizes that there are circumstances where that is legitimate, and lays out certain guidelines. This didn't pass. It's derivative within the meaning of copyright law. It's quite possible for a new work (say a movie adaptation of a book to give a common example) to be very different from the original and still be an adaptation that is not covered by fair use.

There's a good discussion of the case over here: