Marlins manager Ozzie Guillen -- who left the Marlins after Florida won the 2003 World Series to take the job as the manager of the White Sox in Chicago, where the former third base coach led the Sox to the World Series title in 2005 --  is back home in Miami and ready to lead the new-look Marlins, beginning tonight against the defending World Series champion St. Louis Cardinals.

Marlins manager Ozzie Guillen -- who left the Marlins after Florida won the 2003 World Series to take the job as the manager of the White Sox in Chicago, where the former third base coach led the Sox to the World Series title in 2005 -- is back home in Miami and ready to lead the new-look Marlins, beginning tonight against the defending World Series champion St. Louis Cardinals.

MIAMI — Perched atop the Miami Marlins’ multicolored, provocative home-run sculpture is a blue marlin, poised for splashdown whenever the home team hits one out.

Call the artwork what you will — gaudy, goofy, grotesque, great — but there’s no denying it’s new. For the Marlins, that’s what this season is all about.

Long overlooked and underfunded, they’ve become a big-spending, attention-grabbing team as they open the season at home Wednesday night against the World Series champion St. Louis Cardinals.

The pop-art sculpture, futuristic ballpark, brisk ticket sales, team name, uniforms, celebrity manager, All-Star shortstop, All-Star left-hander, All-Star closer and starry-eyed optimism: all new.

With the roster significantly upgraded, the Marlins predict they’ll contend for the NL East title — and more.

“We expect to win,” new shortstop Jose Reyes says. “The kind of club we have, we’re going to compete, no doubt.”

When ace Josh Johnson throws the first pitch in the new ballpark to Rafael Furcal, the Marlins will begin trying to supplant the Cardinals, who mounted an improbable late-season charge to the World Series title.

But like the Marlins, the 2012 Cardinals have a new look. Slugger Albert Pujols and manager Tony La Russa are gone and postseason star Chris Carpenter is hurt, so Kyle Lohse will start the opener. But right-hander Adam Wainwright is back from elbow surgery, Matt Holliday and Lance Berkman remain in the heart of the order, and the addition of outfielder Carlos Beltran is cause for encouragement.

“Their lineup is still stacked,” Johnson says.

Plus, only one team has a chance to repeat as the World Series champion, and baseball-crazy St. Louis is always eager for a season to start.

“There’s a buzz in every home opener,” rookie manager Mike Matheny says. “The buzz in our place is ridiculous.”

While the Cardinals will wait until April 13 to play a home game, outfielder Jon Jay is especially excited about the road opener. The Miami native attended Marlins games as a youngster when they played in the Dolphins’ stadium, so he can appreciate the new ballpark.

“To be able to play the first game there, it’s something I am going to remember forever,” he says. “The Dolphins’ stadium wasn’t really a baseball ballpark. It’s going to be nice for the community to have a real baseball park.”

The centerpiece is beyond the center-field wall — a 73-foot-tall kaleidoscopic sculpture that will launch into animation when the home team hits a home run. Conceived by team owner Jeffrey Loria, a New York art dealer, the work has drawn decidedly mixed reviews.

“There’s a little controversy about whether people are going to like it,” says slugger Giancarlo Stanton, the player most likely to put the thing in motion. “They might not want me to do it. Everyone is saying it’s circusy.”

New closer Heath Bell dislikes homers but loves the sculpture.

“It’s colorful and shiny and awesome-looking, kind of like Miami,” he says. “You definitely won’t see that anywhere else. It’s straight Miami. We’re not dull; we’re flashy, colorful, lively, exciting.”

The team’s new rainbow logo fits with that premise. So does the matching orange-dyed hair Reyes and third baseman Hanley Ramirez now sport.

Fans seem captivated, at least for the moment, and the Marlins anticipate sellout crowds nearly nightly this year in their cozy 36,000-seat home. Heat and rain will no longer be a deterrent, thanks to air conditioning and a retractable roof that gives the ballpark an ultramodern appearance.

“It looks like a spaceship,” Matheny says.

The shiny silver roof will likely be open for only about 10 games a year, and Wednesday might one of them. The forecast for first pitch was 81 degrees and partly cloudy.

Despite hype surrounding the opener, plenty of tickets were available Tuesday for less than $100. And once the newness surrounding the ballpark wears off, the Marlins likely must win to keep fans coming.

“You can have a beautiful house with a beautiful view,” manager Ozzie Guillen says. “But if the people living in the house stink, it ain’t going to be so beautiful.”

The Marlins finished last in the NL East a year ago, 30 games behind the Philadelphia Phillies, but they’ve since added Guillen, Reyes, Bell, left-hander Mark Buehrle and right-hander Carlos Zambrano. They even tried to sign Pujols.

Holdovers include 2009 NL batting champion Ramirez, 2010 NL ERA leader Johnson and precocious slugger Stanton.

“When you go position by position, we’re going to be able to compete with any team in the league,” first baseman Gaby Sanchez says.

Guillen shares that optimism but is well aware of pitfalls after eight roller-coaster seasons with the Chicago White Sox, including a World Series title in 2005.

Yes, the Marlins are new. But at a team meeting Tuesday, Guillen warned his team that new doesn’t necessarily mean better.

“I hope it will be my last meeting until the playoffs start,” he says. “Bad teams have a lot of meetings. Good teams win games.”