Amy ABC vs. Amy CBS vs. Van Damme : Networks: NBC pits the martial arts hero in ‘Lionheart’ against the battling ‘Lethal Lolita’ movies. Which will be the winner? Maybe all three.

One of three things will happen on television Sunday night:

* A movie about Amy Fisher will triumph over a movie about Amy Fisher.

* Or martial arts movie star Jean-Claude Van Damme will whip one of them.

* . . . or both of them.

Already claiming victory are ABC, CBS and NBC, all predicting they’ll come out on top as the Fight of the Fishers reaches its conclusion at 9 p.m. when two separate quickie films on the infamous Amy “Lethal Lolita” Fisher case go head-to-head on CBS and ABC.

And a media research expert, saying the contest to determine the Fisher king will be a supreme test of viewers’ loyalty to their favorite network, speculated that all three networks could wind up winners in the end.

The showdown is the focal point of the unprecedented event, which has three rival networks making films on the same incident and airing them within a one-week period. Amy-mania has dominated the airwaves for the past two weeks, with newsmagazines, entertainment news and talk shows devoting segments on the phenomena.

The shot that the 18-year-old Fisher fired earlier this year at Mary Jo Buttafuoco, the wife of her alleged lover, has had ABC, NBC and CBS taking shots at each other all week--though in a decidedly less lethal manner.

NBC, whose film, “Amy Fisher: My Story,” last Monday earned the highest ratings of any made-for-television movie this season, is urging viewers not to watch ABC’s “The Amy Fisher Story” or CBS’ “Casualties of Love: The ‘Long Island Lolita’ Story.”

A commercial that followed “The Selling of Amy” segment on “Dateline NBC” Tuesday bellowed: “This Sunday, while the other two networks think you’ll actually watch another Amy Fisher movie, NBC presents Jean-Claude Van Damme for the first time in ‘Lionheart,’ ” a 1990 effort.

“You make the choice,” the promo continued. “Another Amy Fisher, or Jean-Claude Van Damme.” An added sound bite quips, “It’s going to be simple.”

A spokesman at NBC said, “Over 41 million people saw our movie, and we’re just trying to tap into that audience. Amy Fisher and the Buttafuocos have been all over the place, and maybe people are getting a little tired of it, and are ready for something new.”

ABC in the meantime is touting the neutrality of its film against NBC’s film, which focused on Fisher’s version of the shooting, and “Casualties of Love,” which features the story of Joey Buttafuoco, Fisher’s alleged lover.

“One network told you her story, and another will tell you his story,” pronounced the ABC promo. “But only ABC tells you the whole story.”

Fisher was sentenced Dec. 1 to 5 to 15 years in prison for shooting Buttafuoco after pleading guilty to assault. She was originally charged with second-degree attempted murder. The Long Island teen insisted to the end that she had an affair with Joey Buttafuoco and that he had encouraged her violent actions. It was also revealed that she had worked as a prostitute.

Joey Buttafuoco has denied having an affair with Fisher, saying he only knew her because she brought her car to his auto repair shop numerous times . Mary Jo Buttafuoco still has embedded in her skull the bullet that Fisher fired. Her mouth is lopsided, and she is recovering from partial paralysis in her face.

Executives at ABC and CBS would not officially comment on the strategy of pitting the two Amys against each other. The decision was abruptly made last week. CBS had previously planned to show its film Jan. 26, and ABC had not yet set an air date.

“We’re giving people a choice, and I doubt if anyone wanted to be last,” said a CBS official.

However, sources at ABC and CBS said they believed they had the edge over the other.

One CBS executive cited the advantage of a heavyweight lead-in--the hugely popular “Murder, She Wrote” starring Angela Lansbury. “We figure that people watching us will just keep their sets on,” said the official.

However, ABC has the upper hand in casting the best-known actress for Amy Fisher--Drew Barrymore, who is better known than CBS’ Alyssa Milano. Noelle Parker played Fisher in NBC’s movie.

Larry Gerbrandt, a senior analyst at Paul Kagan Associates, a media research firm, said CBS’ lead-in and ABC’s casting may turn the contest into “a dead heat.”

However, he added, “Somebody will win and somebody will lose. But in the overall scheme of things, everyone wins. My guess is that everyone will come up a winner. All this publicity shows that the networks are doing something right. Having two of the movies go head-to-head is great from a promotional standpoint, and a network counter-programmer could have a field day. It’s one of the few ways you can create an event out of what would ordinarily be a pedestrian TV-movie.”

For those viewers who still haven’t gotten their fill of Fisher after Sunday’s contest, the USA Network, in an unusual agreement, will air CBS’ “Casualties of Love” on Jan. 7 and Jan. 9. Said network spokesman Paul Reader: “It’s a terrific story, and everyone is insatiable about it.”