There are now more detailed images of the Pirate Roller Coaster (31084) from the summer 2018 wave of the LEGO Creator sets. This year is the year of the roller coasters and it’s due time that we get something like this to add to the Fairground subtheme for LEGO Creator line. The first roller coaster was introduced with The LEGO Batman Movie The Joker Manor (70922) and it reuses some of the tracks in a new and more restrained color.
The 923 piece Pirate Roller Coaster is a 3-in-1 set which means that the main model can be changed into two other models using the same parts. The set pays homage to classic Eldorado Fortress (6276) with the Imperial Fortress and you also get a skull to go along with it. The other suggested builds include a small back and forth track and a mini-go-round.