About the pool "About Time - Saw It Coming":

Mauricio de Sousa and Osamu Tezuka were friends and have been planning to make a joint project before Osamu Tezuka died. In 2013, Mauricio de Sousa launched a crossover story with his and a few of Osamu's characters, including Monica (from Turma da Mônica Jovem) and Sapphire (from Ribbon no Kishi), which was allowed by Tezuka Productions. Hence this official art.

A few links about this:
https://web.archive.org/web/20130729085553/http://ajw.asahi.com/article/cool_japan/AJ201202010008
https://en.wikipedia.org/wiki/Mauricio_de_Sousa
https://www.japaoemfoco.com/a-amizade-de-tezuka-osamu-e-mauricio-de-souza/
https://madeinjapan.com.br/2018/03/14/mauricio-de-souza-lanca-manga-em-homenagem-tezuka/
http://pipocaenanquim.com.br/lancamento-2/mauricio-de-sousa-e-osamu-tezuka-juntos-fomos-ao-evento-de-lancamento/

For those who don't know, Zazo Aguiar is the cover illustrator for "Turma da Mônica Jovem" (Monica Teen) at Mauricio de Sousa Produções.