I really like Zenos as a primary villain, and I'm glad he has followed us out of Stormblood. Prior to Emet-Selch, I thought Zenos was one of the most effective villains we've had in the FF series, but SB didn't give him enough of a chance to shine.

I agree about him being our antithesis, and I think that's part of what makes him great. We can have great tragic villains like Emet-Selch and still have room for 100% evil villains. I know a lot of people think the black and white evil villains are boring, but his motives are more than just the "I'm evil, and I want to take over the world." I am excited about his future character arc, although, I think Emet-Selch should have been in the spotlight longer with Zenos being more of a background threat for a while.

I'm wondering what his involvement will be with the First, if any. Since he has the fake echo, does this mean he could theoretically travel over to the First?