Great to see Futurama mentioned here. I think it would be wonderful and would sell quite well. It was a hugely popular show. I find it interesting to hear that folks think it'd be better as a Spooky machine; after the awesome machine we got from Stern with Simpsons Pinball Party it seems to me they'd be a great choice to do another Matt Groening show in Futurama (and might have good relationships/trust with some of the folks and organizations involved).
I'd view Spooky as perfect for something a bit more niche, and to that I offer that an awesome new Spooky machine would be...
Gravity Falls.
Fantastic theme, amazing show, but wouldn't sell nearly as well as a Futurama would so it'd be great for a limited release. I know I'd buy one for sure.