By Brent Lang   According To The variety Get ready to head back to the Pleistocene era! Disney and 20th Century Animation announced Friday that “Ice Age 6” is in the works, which means that Manny, Sid, Diego and the rest of the herd will soon return to screens. In a video announcing the sequel, Ray Romano, John Leguizamo, Queen Latifah, Denis Leary, and Simon Pegg, who have all led the voice cast of the family franchise, announced that they are coming back for a new adventure. The film is currently in production. The last “Ice Age” film, “Collision Course,” opened in theaters in 2016, grossing $408.5 million globallly. It’s a franchise that’s had legs — the first film, “Ice Age,” bowed in 2002. There have also been several shorts and series featuring various woolly mammoths, groun...