“Men in Black 3″ is suiting up for $80 million domestic and an impressive $240 million worldwide at the Memorial Day weekend box office, easily dethroning “The Avengers” — though the Marvel meet-up will still haul in a whopping $50 million Stateside in its fourth frame, according to early Friday estimates.The return of Will Smith to the bigscreen after a four-year hiatus (which reportedly cost $230 million but has been rumored higher) is on track for $19.5 million Friday — but “Men in Black” could see an uptick in evening auds, according to B.O. analysts. Marking the franchises’s first film in nearly a decade, Sony’s 3D tenpole reunites helmer Barry Sonnenfeld, Smith and Tommy Lee Jones. Josh Brolin co-stars in the threequel. “The Avengers,” meanwhile, has already amassed $1.2 billion worldwide and should cross $500 million domestically by Sunday. It’s well on its way to topping “The Dark Knight” ($533 million) as the third-highest grossing film in U.S. history. This weekend’s other wide release, Warner Bros.’ low-budget horror pic “Chernoble Diaries” should scare up $10 million.