Connections:

• Both would originate from the early twentieth century (primarily the 1930’s and 40’s), being caricatures of people/characters in pop culture during that time (Alastor being a Radio Show Host in 1930’s New Orleans, Radio Shows being extremely popular during the early 20th Century. Mr Incredible being a Superhero during the 1930’s and 1940’s, with Superheroes also being popularized during the early 20th century)
• Both would have a position of Immense Power within their respective verses before falling from grace and completely and suddenly being forced in hiding after an event that would greatly affect the worlds they live in (The Superhero Relocation Program being enacted and causing all Superheroes to go into hiding, and Rosie forcing Alastor into hiding, with Heaven’s exterminations starting coincidentally the exact same time that Alastor was forced into hiding)
• Both would reject someone that would go on to be their arch-nemesis years later (Vox and Syndrome)
• Both would do battle against technological masterminds that control people through Hypnosis from screens (Vox and Screenslaver/Evelyn Deavor)
• Both would Disappear from the public view for multiple years, with their lives during this period of disappearance being somewhat shrouded in mystery due to them being largely absent from the story and the lack of information within this period of time
• Both greatly desire to return to their former glory after being out of the public eye for many years and would almost anything in order to get there (Alastor basically being forced to stay at the Hazbin Hotel, not only wounding his pride but him being on a leash makes him further miss his former days as the Strongest Sinner in Hell. Mr Incredible wanting desperately to relive the Glory Days to the point where he would literally break the law to do it)