Guardians of the Galaxy Vol. 2 adds a few intriguing wrinkles into everything we thought we knew about the Universe’s most dysfunctional heroes. For one thing, we’re finally going to meet Peter Quill’s dad Ego the Living Planet who, until now, has been kept a mystery (unless you’ve read the comics). But there’s another interesting development in place: Nebula, Gamora’s blue-headed adopted sister and fellow daughter of Thanos, seems to have joined up with the Guardians. And, at first, it doesn’t go so well.