Adam B. Vary Senior Entertainment WriterSPOILER WARNING: Do not read if you haven’t seen Season 1, Episode 3 of “Loki,” streaming now on Disney Plus.Marvel Studios has its first official LGBTQIA+ superhero — or, depending on your point of view, supervillain.On the latest episode of the Disney Plus series “Loki,” Tom Hiddleston’s titular god of mischief confirms what had been long established in the pages of Marvel comics, that he is bisexual (or, just as likely, pansexual).It happens during a conversation Loki has with a Loki “variant” named Sylvie (Sophia Di Martino), who revealed herself at the end of last week’s episode just as she launched her grand scheme to wreak havoc on the Time Variance Authority.