Both Alien and Evil Dead would be great triple A licenses, but I have a feeling license costs and restrictions would be prohibitive for a run of less than 1000 games. I do think Spooky is in the perfect position to do mid-tier licenses like Rick and Morty that might not warrant attention from a large company like Stern but would still be near instant sellouts. If I were in Spooky's position I'd take a look at the following:

Futurama - might be too past its prime for Stern.
Beavis and Butthead- I could see Stern taking a chance on this one as well.
Bob's Burgers
Beetlejuice - Stern may still have the license but it sounds like they recently passed on doing it. Might be too costly/restrictive though?
Archer
Bojack Horseman