Oh hey! Lookit who fell down the Rabbit Hole of the interwebz again! Meeeeee! Where'd I pop out? In Lisbon, Portugal!
Yep, from what I'm seeing, it looks like it's possibly perhaps maybe gonna be an OPI Lisbon Spring Summer 2018 Collection. I can't say it's Lisbon for sure because ya'll know I don't actually work with (or for) OPI, right? I just wander around the web, find stuff, go "Oooh!" and share it with you.
That's all I found. Well, that plus all 12 shades will be available across all 3 lines: nail lacquer, Infinite Shine, and GelColor.
Do I have a date for you? Ppfft. Hellz no. But if I had to guess, I'd say early 2018?
Here, have a bottle-shot picture of last year's OPI Fiji Collection. Why? Just because it was my first thought when I saw Lisbon.