While on air for a podcast with Nerdist, Rockwell said “they were going to do a sequel on Amazon. We were ready to sign up, and [then] Alan Rickman passed away and Tim Allen wasn’t available – he has a show – and everybody’s schedule was all weird. It was going to shoot, like, right now. And how do you fill that void of Alan Rickman? That’s a hard void to fill.”
A hard void to fill indeed. By Grabthar's Hammer, what a crying shame.