With Mansions of Madness 2nd ed coming with never before seen Investigators, I would love to see a release of them for Arkham Horror.
A print on demand or somthing along that nature that includes Agatha Crane, Carson Sinclair, Father Mateo, and Preston Fairmont.
Arkham nights promos would be another way to get them in Arkham Horror.
We are still seeing expansions for Elder Sign and Eldritch Horror so I'm not so concerned about them being added to those games. It has been a while since Arkham Horror has gotten any form of release.
Just my thoughts since this is the first time NEW investigators have been released in a long while.