This twist was awesome. In the past the only time Goku fought himself was like, during his younger years, at Kami's palace, training for the next martial arts tournament against Piccolo... but that was only a model figure with one hair from Goku. Wonder what would happen this time, and how he would deal against himself... if that really is himself.

Also there's several questions.

What exactly happened in Trunks' future Age? Even Bulma did not survive this time.

Goku's not easily swayed to the dark side, so it had to be an assimilation of sorts, right?

What's with the earring and fingerring? They look similar to the ones the Supreme Kai used, but earrings always come in pairs, and this one's missing the other half. What happened?

No Hakai-shin(god of destruction) in Trunks' future Age, or did Goku Black already wiped him out?