The code name for the Busch Gardens Sand Serpent replacement is Project Halycon. This project is not just taking the old Sand Serpent plot of land, but a huge part of Pantopia. Although there have been no official announcement about a replacement, clues can be drawn from permit filings about what the park is up to. You can see from the permit revisions below that there is a locker area proposed and there is also a test seat involved. It also mentions a station! Thanks to Penguin_Master23 on Parkfans.net for finding this on the Accela Database which is a wealth of information for building permits searching under the park’s name or address.

So just because it has lockers and a test seat doesn’t mean it’s a coaster. After all, Stanley Falls has lockers and there’s a test seat for Serengeti Flyer. However, these taken together combined with the size of the space are tantalizing clues about what is coming to Pantopia and replacing Sand Serpent.