In my headcannon, Rainbow keeps trying to appeal to Magneto who was Charles Xavier’s brother. And finds out Apocalypse used him since his wartorn childhood in World War 2. And warns especially in the Sokovia Accords. Some including Fluttershy, Spider-Man, Shang-Chi, the Guardians of the Galaxy, Doctor Strange, T’Challa, MJ, the X-Men, Kraven the Hunter, Calypso, Michael Morbius, Martine Bancroft, Vision, Black Widow, Captain Marvel, Pinkie, Daring Do, the CMC, M’Baku, Iron Fist, and the Silver Surfer belive ; while some including Iron Man, Twylight, Rarity, Applejack, War Machine, and Ross accuse of this as kids to justify rebellion. And when Apocalypse is freed thanks to them, he reveals her used Tony’s side and Twylight as well as Punisher and Jonah Jameson.