"Masters of the Universe" charges into theaters starting on June 5, 2026. (Image credit: Amazon MGM) The wonderful World of Eternia is positively brimming with heroic warriors, courageous robots, strange mutants, nefarious necromancers, beastly companions, and the coolest command post under the sun, Castle Greyskull. To introduce fans both young and old to this colorful and chaotic realm, Amazon MGM Studios has compiled two new " Masters of the Universe " video featurettes that present an excellent opportunity to get up close and personal with all the iconic characters that you'll see when this Travis Knight-directed spectacle lands on June 5, 2026.…