Writer/director Ryan Coogler’s entry into the Marvel franchise, Black Panther (B+), is a regal rouser with a superhero who also presides as monarch of a fictional secret African nation. Chadwick Boseman is dashing as the lead in the globetrotting film set largely in his high-tech palace city, but (like Thor) he’s often upstaged by a moody, Machiavellian villain, played with swagger by Coogler muse Michael B. Jordan. A supporting cast including Lupita Nyong’o, Daniel Kaluuya, Angela Bassett and Forest Whitaker brings pluck to the proceedings, but the best actors in the bunch are Winston Duke as a reluctant warrior and Letitia Wright as the king’s Q-like kid sis. The film takes a while to accelerate into the throne room barn burner it becomes, but once it generates steam, there’s a deliciously delirious set of showdowns in Korean crime dens, atop waterfall cliffs, in battle meadows and aboard Tron-like light rail tunnels. It’s a vibrant adventure and a morally urgent political parable that delivers on a variety of levels.