So, he’s not just writing the Warhammer 40,000 TV show, he’s creating it. Where does this leave former Superman actor and Warhammer 40,000 superfan Henry Cavill? I also think this Warhammer 40,000 TV show will have to be mindful of staying grounded to a degree, not least to keep it within scope and budget. Who will Henry Cavill play in Amazon's Warhammer 40,000 TV series? Its sequel, the Warhammer 40,000 lore treasure trove that is Penitent, followed nearly a decade later, in March 2021.