I disagree entirely on the Mario bit, and it's not just because unlike...well most gamers I have no default affection for the Mario series. Simply put, here is the problem in a nutshell:
Pick up any 1 Mario game. Your favorite, according to the overthinker is Super Mario World 3, so let's use that. Pick up this game and then, using evidence only presented in THAT GAME ALONE, tell me: Who is Mario. Where does he come from, how did he get to the Mushroom kingdom, why is he always rescuing Peach? What is his connection to the royals, what is bowsers? What is everyone's characterizations and motivations?
If you can't do that, it has NO business being a film. You have a limited amount of time to introduce and characterize these people and if they can't do it in one game what makes you think anyone can do it in one movie? This is above and beyond all the conceptual problems, which are gonna take some heavy work because what works in animated films and video games does not always work in live action. And then there's the narrative problems, which boil down to "There is no real narrative." But all of that can be worked around with a good filmmaker, but before it can, you have to be able to pick up any ONE game from the series and tell me all about those people from that game. Do that and I'll rescind this statement.
Not that anyone cares what I think anywho.