USA TODAY — Everyone's favorite foul-mouthed crime-fighter is back.

Ryan Reynolds is squeezing back into Wade Wilson's red leather bodysuit for Deadpool 2 (in theaters Friday), the R-rated sequel to the surprise smash hit that sliced off $783 million at the worldwide box office in 2016. This next installment manages to pack in even more laughs, violence and pop-culture references than the first, as the sword-wielding mercenary assembles his mutant X-Force team to save an abused teen (Julian Dennison) from unleashing his fiery powers on the world.

Reynolds, 41, who co-wrote with the original movie's writers, Rhett Reese and Paul Wernick, tells USA TODAY what you can expect from Deadpool's latest.

Move aside, Colossus.

The bromance between metallic mutant Colossus (Stefan Kapicic) and the "Merc with a Mouth" is alive and well in the sequel, complete with tinny tush grabs and a spot-on Say Anything ... boombox parody. But the story's core relationship is that of Deadpool and cyborg assassin Cable (Josh Brolin), who start as enemies but eventually find common ground in their tragic backstories.

"I love that we introduce Cable into this film as our big baddie and that it takes a bit of a turn," Reynolds says. "By the end of their journey, Cable has given an inch and Deadpool takes a mile with their relationship. He's obviously overplaying it with Cable and it’s a lot of fun."

Marvel and DC jokes are both fair game.

The sequel wildly ups the ante for meta, self-referential humor, with Deadpool tossing out playful (and often expletive-filled) quips about fellow Marvel superheroes including Wolverine, Black Widow and Black Panther. But one of the most memorable one-liners comes at the expense of Marvel's comic-book movie rivals, as Deadpool taunts a foe, "You're so dark. Are you sure you're not from the DC Universe?" (A reference to the franchise's characteristically dreary color palette and lack of humor.)

"We're certainly not above poking fun at the distinction people draw between the universes," Reese says. "People know the difference between a Marvel and DC movie, and (understand) the overall tone and experience they're going to get. So we just had fun with it."

Reynolds used his Canadian connection to woo Celine Dion.

The French-Canadian songbird is the last person you'd expect to hear in a Deadpoolmovie. But her legendary pipes make an appearance in the James Bond-style opening credits, which roll over her delightfully overwrought Ashes.

"The studio presented us with a ton of hyper-talented, Millennial-friendly singers and we thought, 'Let's just go straight to the legend first,' " Reynolds says. The actor emailed her, which was "tantamount to digital begging. I met her once in passing a couple of years ago, so I referenced that, and may have dropped that I'm also Canadian."

There's way more blood, guts and baby legs.

If you thought the first movie was gruesome fun, then you're in for a treat this go-around, as Deadpool decapitates his adversaries to the tune of Dolly Parton's 9 to 5, gets blown to pieces in a gas explosion and is viciously torn apart by a monstrous mutant. Fortunately, one of the Merc's powers is regenerating limbs, leading to one of the film's funniest sight gags as he totters about on infant-like legs.

"He got his arm cut off in the first one and we wanted to step it up just a notch by ripping him in half," Wernick jokes. "I don't know what we're going to do on the third one," which they plan to write after Drew Goddard's planned X-Force spinoff with Deadpool, Cable and overly lucky mutant Domino (Zazie Beetz).

Barbra Streisand and snowmen make tuneful cameos.

The film begins with Wade and girlfriend Vanessa (Morena Baccarin) living blissfully, plotting to start a family and watching Barbra Streisand's 1983 movie musical Yentl as ... foreplay? Post-coital entertainment? "I like that it's open to interpretation," Reynolds deadpans. The drama's Oscar-nominated song Papa, Can You Hear Me? becomes a running joke, after Wade marvels that it sounds just like Do You Want to Build a Snowman? from Disney's Frozen.

Reynolds thought of the gag two years ago, after catching Yentl on TV and countless re-watches of Frozen with his two daughters, James (3) and Ines (20 months), with wife Blake Lively. "It sounded like a very frighteningly similar song, so I made a little light of it," he says.