Fantastic Beasts doesn’t start shooting until this summer, but preparations may already be underway.

It’s Friday, so let us indulge in some classic Harry Potter theorizing, shall we?

The existence of Leavesden Studios’ “Warner Bros. Studio Tour London: The Making of Harry Potter” means fans of the Wizarding World are dropping by the studio on a daily basis to check out the sets from the first eight Harry Potter movies.

So it’s not a surprise that a couple of fans this week spotted some interesting structures going up in Leavesden’s back yard. As diehard Potter fans, you can’t help but wonder if these sets are for Beasts.

The photos were taken by @GinnyWeasleys on Twitter (And thanks to Hypable reader Justin who passed them along):

While these photos were taken from a distance and don’t offer many details, if you look closely enough you can make out what appears to be rock work on the left:

The building on the right is quite interesting. The peak in the center of the building reminds us of The Wizarding World of Harry Potter – Diagon Alley’s London waterfront:

At Leavesden:

At Universal’s Wizarding World:

While we know that Fantastic Beasts will be set in 1920s New York, it wouldn’t be surprising if Newt Scamander returned to London for whatever reason. Maybe he’ll be there at the beginning of the film.

The person who snapped the photos asked security if the sets were for Beasts, but security wouldn’t comment.

If you believe Leavesden Studios’ Wikipedia, no movies are currently shooting on the property, meaning preparations for Fantastic Beasts could begin now. The most recent films that shot there were The Man from U.N.C.L.E., In the Heart of the Sea, and David Yates’ Tarzan, which wrapped filming in October.

The Harry Potter series took over the majority of Leavesden while it filmed there for 10 years. Only four other films shot there while Harry Potter occupied the space. With Fantastic Beasts set to be “at least” a trilogy, the Wizarding World may once again take over Leavesden.

Harry Potter and Fantastic Beasts producer David Heyman revealed in January that filming is expected to begin in “late summer.” Warner Bros. has confirmed that shooting will take place at Leavesden.

What’s your guess? Are these for ‘Fantastic Beasts’ or something else?

Related: Five Harry Potter characters we could possibly see in Fantastic Beasts