Thanks for the excellent references! (I was recently planning to be in Vienna to check out some of these works at the Kunsthistorisches.)

Ah the 2018-2019 exhibition you're referring to was done for his 450th anniversary. I recall going on a "Bruegel binge" and visited some 5 exhibitions in 2019 winter in Brussels and Antwerp. It was outstanding. One of the memorable exhibitions was an immersive experience in Brussels: four entire rooms were projected, from floor to ceiling, with Bruegel's works, slowly zooming in while beautiful piano music played.