Mighty Morphin Power Rangers may have been the Christmas season’s hottest toys, but the newest crime-fighting superheroes, Biker Mice From Mars, have also attracted the interest of major studios after huge sales of the characters’ debut homevideo.Mice hit trifecta Created by Rick Ungar — who was behind the short-lived Fox series “Totally Hidden Video”– the Mice have already hit the trifecta, scoring success as toys, videos and a TV series. And now Ungar is being wooed by studios interested in creating the live-action equivalent of the road warrior rodents. “I’ve had some real interesting offers,” said Ungar, who is close to completing a deal with a Hollywood producing team. “I suspect we’ll see a (Biker Mice) feature film by 1995.” Best Film and Video pushed up the original January street date to last month to take advantage of the Christmas season and to tap into the positive response by retailers. The move paid off. The vid series is “the fastest-selling video out of the box we’ve ever seen,” said Roy Winnick, president of Best. Keepers The initial vid package boasts three collectible episodes of the crime-fighting crusades of Vinnie, Modo and Throttle, in the show’s pilot and first two episodes. Future vids, Winnick says, are also likely to sport three episodes at a time rather than just one program, in a further effort to distinguish the Mice from its competition. Ungar said the video buzz and a toy deal with Galoob will help 1994 revenues for Biker Mice properties top out around $ 60 million. He just closed a deal with Sega for a vidgame that is scheduled to hit the streets in time for Christmas ’94. This year’s game plan also includes a weekly strip of the show — with Genesis Entertainment the syndicator — and the release of a soundtrack on MCA Records. Galoob will also kick up its TV support of the line.