NEW YORK — A superhero-heavy lineup is headed to “Saturday Night Live.” Oscar Isaac and Zoe Kravitz will host episodes of “SNL” next month, NBC announced Thursday. Isaac, who stars in the upcoming Marvel series “Moon Knight,” will headline the March 5 episode, where he’ll be joined by pop star Charli XCX as the musical guest. Kravitz, who plays Catwoman in the much-anticipated movie “The Batman,” will then host the sketch comedy show on March 12, with Spanish singer Rosalía performing. The episodes will be the first-ever “SNL” hosting gigs for both Isaac, 42, and the 33-year-old Kravitz. They’…