Two rollercoasters we’ve already heard about -- and two we haven’t -- were revealed at a recent gathering of roller coaster enthusiasts and industry insiders. The thrill rides are in the works inside the massive theme park in the under-construction American Dream mega-mall in Bergen County.

The American Coaster Enthusiasts held an annual “EastCoaster” gathering at Hershey Park this past weekend where representatives from Nickelodeon Universe unveiled four roller coasters that will be part of the indoor theme park at the American Dream, Elizabeth Ringas, communications coordinator for ACE said.

Triple Five, the developer of the American Dream, announced more than a year ago that two record-setting roller coasters would be coming to the site. But their themes and character-associations were not known until this ACE announcement.

Roller coaster enthusiasts rejoiced. Here’s what ACE has shared of the news:

The roller coaster with the record-setting steepness will be called the TMNT Shellraiser (TMNT= Teenage Mutant Ninja Turtle). It’s from German-based Gerstlauer, and the model is referred to as the “Eurofighter.” It will hold the record as the steepest plunge on a rollercoaster in the world.

The ride will pause at the top of a 122-foot drop, giving riders a glimpse of New York City, across the Hudson River.

The other record-setter we’ve been hearing about has now been identified as “The Shredder” -- likely named after the Teenage Mutant Ninja Turtle antagonist, Shredder. It is also a Gerstlauer model and it will hold the record for being the tallest and longest free-spinning roller coaster.

Two previously unmentioned roller coasters were also unveiled: Sandy’s Blasting Bronco and Slime Streak.

Sandy’s Blasting Bronco, enthusiasts surmise, is probably named after SpongeBob SquarePants’ dive suit-wearing friend, Sandy Cheeks.

The final new ride unveiled is called Slime Streak. It’s manufactured by Kansas-based Chance Rides and is less heart-pounding and more family-oriented than the record-setting roller coasters planned for American Dream.

Representatives for American Dream and Nickelodeon Universe did not immediately respond to a request for comment.

The 3 million-square-foot American Dream mega-mall is expected to open this spring. About 55 percent of it will be devoted to entertainment, including the 8-acre indoor Nickelodeon Universe amusement park. The rest will be retail.

Allison Pries may be reached at apries@njadvancemedia.com. Follow her on Twitter @AllisonPries. Find NJ.com on Facebook. Have a tip? Tell us. nj.com/tips.

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