Marvel Studios President Kevin Feige is will be present at Brazil's Comic Con Experience (CCXP) this Saturday, December 7. He's expected to offer early looks at both of Marvel's 2020 films, Black Widow and Eternals, according to Deadline.
Though the Hollywood trade didn't specify what material from each footage may be shown, both films were previously presented at Comic-Con International: San Diego in July, with footage from Black Widow being shown and Eternals concept art making its debut.
There's a chance that an official Black Widow trailer could debut at the CCXP presentation. Marvel Studios has debuted trailers at large cons before, and the first Avengers: Endgame trailer premiered on exactly December 7, 2018 - putting Black Widow in the same window for a trailer release.
It hasn't been confirmed whether any new footage or material from Black Widow or Eternals will be shown, or if whatever does premiere at CCXP will be released publicly.
CCXP takes place December 5-8 in Sao Paulo, Brazil.