Malebolgia (Spawn) vs. Black Doom (Sonic the Hedgehog)

• Both are massive, religious themed monsters who act as grand masterminds, using their power to help a create a red and black powerhouse antihero known for shooting energy and shooting massive guns in they hopes they would lead their respective armies and conquer Earth
• After this antihero (Spawn and Shadow) refuse this offer and despite their memory loss go on to fight for good, both villians create replacement (various Hellspawn like Billy Kincaid and Eclipse) to fill the void, doing whatever they can to spite their original creation and moving forward with their plans of conquest
• Both watch from the sidelines away from danger but are both incredibly powerful in their own right
• Malebolgia and Black Doom act as rulers of their respective forces until their death, as they are replaced afterwards (Mammon taking over to spite Malebolgia, and Black Death being created to run The Black Arms if Black Doom was to ever die)
• One is hated by their subjects, while the other is adored like a prophet
• Giant magic kaiju fight with an army battle thrown in for good measure? Hell yeah!