Space Jam: Titans of Cult (4K Ultra HD Blu-ray) (Steelbook) are now available for pre-order at Zavvi. Ship in July 2021.
https://us.zavvi.com/blu-ray/space-jam-titans-of-cult-limited-edition-4k-ultra-hd-steelbook-includes-blu-ray/13106235.html
Iron Man is officially oos and discontinued. Captain America and Civil War oos for ispu and almost sold out for shipping. Doctor Strange, Ant-man, and Winter Soldier are oos and discontinued.