We are YET to get a Villain set in the Legacy Wave

I know various criticisms of the X-1 inclusion have been mentioned, but what I feel is often overlooked is the amount of potential iconic villain lairs and vehicles that can be included in legacy remakes. Since Legacy often focuses on the very early seasons, it would be great to get reworks of sets like Garmadon's Underworld Fortress or the Skull Truck (though I don't think you can top that model but it would still sell crazy). There is also the scrapped Snake Train set that could be reworked...