Of all the times to recast the most iconically American comic-book character with a Black actor and then pit him against a violently angry supervillain with an unnaturally reddish skin tone, who also happens to be the new US president … Sorry if that’s a spoiler, but it is in the trailer for the new Captain America: Brave New World, just released into a tumultuous Trump-run America that’s itching for another culture war. If Marvel was looking for some attention to reignite its beleaguered movie franchise, it seems to have found it – but not necessarily the good kind. If...