Chuck's training is an evolution of Westside having trained there for 20 years. They have some Westside elements such as circa max work but Chuck is also a fan of making exercises ludicrously difficult, hence the hanging chain squats they mention above. Chuck has a lot of weird exercises they do.
If someone can link to Brandon Lilly's YouTube channel, he has some recent footage on there from Chuck and the other Lexen guys.
Don't call it a comeback