LEGO AT-AT prototype

When I saw Rebels back then, I was convinced this walker would definitely make it into a LEGO set, but LEGO missed the boat. For years, I held out a faint hope of a LEGO AT-AT prototype set. I knew that wouldn't happen unless it at least made another screen appearance (there's no way LEGO would choose a gray elephant if they were making a revival set of Rebels), so I was really hoping for Andor, Badbatch, and the Obi-Wan TV show. Eventually, somehow, the prototype returned in the new...