Immortan Joe is a mirror image of Mad Max in Fury Road

He has a Tom Hardy version of a Bane mask.
Both Max and Joe wear masks in the beginning.
Max takes off his, but doesn't reveal his name till the end of the film, so he's still sort of a mystery as if he wore a mask.
Joe keeps his on till Furiosa rips his off.
Joe is a family man, a sort of Armaggeddon? version of Max.
Baby imagery.
War Boys, Wendy and Peter Pan.
Joe has children. Max doesn't, but wanted to gain a family in Road Warrior after losing them in the first film.
Both three letter names.
Sean McDougall mentions Immortan Joe's past placement to the old WWII and prior life, with religion and lack of technology, outside of vehicles.
Joe's a Greco-Roman god in that he is physically, still existing one.
He is a Christian God in his power.
He is a Norweigan God with Valhallah
Immortan Joe is a man of control.
He's created himself as a god.
He wants to create babies, images of himself.

I debate the connection between Joe and the War Boys with Max and the Feral Kid of Road Warrior.
Also, Nux is a former War Boy and fights on Max's side like with the War Boys and Joe and many other examples.
Sequels and babies and creation are a thing in the film.
According to wikipedia, Furiosa was originally supposed to be a infertile wife of Immortan Joe's. Disgarded.
She has a shaved head like a baby.
There are multiple dead baby bones throughout the film. There's a dead baby within the film, which likely isn't actually shown to distract from the story.

Max meanwhile is a mortal savage according to Road Warrior.
I do debate that this film may be too dependent on being a Road Warrior sequel hurting Fury Road's cred.

Although Rob Ager has mentioned that post-Road Warrior, there is no need for Max to relive its events having gone on, Paul Thomas Anderson has stated that he doesn't make films based on plot. Craftsmanship is pretty key in films which I think Ager has neglected over things.
Mad relives the events of the film, and it could be implied that Mad Max Fury Road could all be in Max's head just like Joe is, even in a dilapidated create your own God that controls you thing. (Not to start too much of a Pagan/Atheist debate, but isn't that what every God is?) He goes on Fury Road in his head and not actually in the film, fighting a struggle with himself in the dream shadow of Joe.