Another update: CINQO closed in late 2017. That sure didn't last long!
Update: Opened the week of January 22, 2017
Thanks to Nadia F. via the Conejo Valley Guide Facebook Page for pointing out that a new restaurant is coming to the Oakbrook Plaza on Avenida de los Arboles and Erbes Road (near Vons), CINQO Fresh Mexican Eatery. We have no other details at this point but stay tuned.