Sure enough, a recently-leaked photo seems to corroborate that hunch. (See it here!) We see rows of benches lined up in a farm, with strings of lights and chandeliers hanging from the rafters. In the background is a flowery arch on a dais, and in foreground is a bouquet of flowers on a barrel. Also in the shot is an official Grey's Anatomy clapboard.
The image was posted to Tumblr, but its source is indiscernible. Guessing by how spoiler-shy the producers are, we're guessing a reveal of this magnitude might land some cast or crew member in hot water!
Looks like a beautiful wedding, huh? But do you think it'll top the ceremonies of Calzona, Crowen, Ben & Bailey, and Izzie & Alex? Let us know in the comments below!