The ad also asks fans to save the date for November 13, 2020 at 3pm, suggesting an imminent reveal for the enormous set. The text beneath the image further hints at the existence of the Colosseum (translated using Google):
LEGO presents the brick reproduction of one of the most fascinating monuments in the world. This is the largest LEGO product ever made, with great attention to detail to make it faithful to the original and to enhance its timeless beauty.
The model would typically have belonged to the Creator Expert theme. However, the LEGO Group retired that label this year, replacing it with the 18+ badge. It’s safe to assume that if this rumoured Colosseum does pan out as LEGO Italy suggests, it will carry that new 18+ designation.