This Mariology is about what might ultimately happen to Mario, and some other Mario characters from information from the games. Let's start with the Mario Bros., Peach, Daisy, and the Wario Bros. I theorize that Mario and Peach will eventually be married, and Mario will become king of the Mushroom Kingdom. This event in the future could happen, since Peach and Mario, as we all have seen in the games, have a boyfriend-girlfriend relationship. Thier relationship can be proved by a scene in Marrymore from Super Mario RPG, in which Peach wishes about someone marrying her and then Mario nodding his head, and by the scenes in Paper Mario when Mario and Peach are alone, being shy around each other. I theorize that the same will happen between Luigi and Daisy, with Luigi becoming king of Sarasaland. Waluigi will probably, in a future game, get a girlfriend and one day get married, or he will forever be alone and will live a lonely life. He might also keep being rivals with Luigi. Wario, on the other hand, might accidently rescue a princess, like he did with Princess Shokora in Wario Land 4, fall in love, and get married, or, because of his brutish nature, get shunned and starts living a lonly life, or he might not accidently rescue a princess and never experiance true love at all. Then again, he might fall in love with Peach, and end up seeing her get married to Mario, which will break Wario's heart, causing him to live a lonely life. (personally, I don't like this future for Wario). Either way, he will be rich in the end. Also, he might one day be friends with Mario, since he's been appearing in all the latest spinoff games, being slightly nicer to Mario.
Now let's see what might eventually happen to Bowser, and the Kooplings. From what we mostly see in the games, Bowser is in love with Peach and keeps kidnapping her. What happens next is that Mario then comes near the end of an adventure, beats Bowser, and rescues Peach. From what I see, I theorize that Bowser will one day die at the hands of Mario, that Peach will one day learn how to defend herself from Bowser, preventing him from ever capturing her again, or Bowser will quit trying to take over the Mushroom Kingdom and die of old age. As for his children, I theorize that they're already dead since they haven't appeared in any other game since Yoshi Safari, that they'll die before Bowser dies in a final battle with Mario, leaving the Koopa empire in shambles, or they'll survive the battle and either continue their late father's plots, or will just rule the Koopa Kingdom.This is just a few theories on what will most likely happen in the future for some important Mario characters.