Super Mario Bros. Z Reboot

Basic Plot

 * Takes place after Excursion and the upcoming Sonic game.
 * Opens with Sonic and Tails facing off against Eggman's ship as it nears the Mushroom Kingdom.
 * The battle can be seen all the way from both Peach and Bowser's castles, with the Mario Bros. present at the former.
 * Sonic and Tails are forced to retreat via the Tornado as Eggman's ship lands and his forces begin to scout out the Mushroom Kingdom.
 * Bowser deploys soldiers to investigate Eggman's ship, but they're severely outclassed and forced to retreat.
 * As Bowser sends ambassadors to Toad Town warning Peach of the new threat, the Mario Bros. are summoned to Star Hill.
 * Sonic and Tails are also present at Star Hill, along with several Eggrobos.
 * The Eggrobos manage to force the Star Spirits out of the hill, and all three sides seek to rescue them: Mario's to utilize their powers against Eggman, Sonic's to stop Eggman's antics, and Eggman's to weaponize them.
 * Bowser attempts to wage his own war against Eggman after the latter takes over his castle and brainwashes his troops, but fails miserably and has to work with Knuckles.

Heroes

 * Mario
 * Fearless leader.
 * Has F.L.U.D.D. with him.
 * Can utilize the powers of the Firebrand.
 * Wants to ensure that Eggman doesn't bring chaos to the Mushroom Kingdom.
 * Luigi
 * Cowardly.
 * Has his trusty Poltergust 5000.
 * Capable of utilizing the Thunderhand.
 * Sonic
 * Seeks to stop Eggman at all costs as usual.
 * Sees Mario as a nuisance.
 * Has all seven Chaos Emeralds with him.
 * Tails
 * Pilots the Tornado.
 * Intrigued by the technology used by Bowser's troops.
 * Often scared when not with Sonic.
 * Bowser
 * Tries to be a hero, but still has villainous qualities.
 * Rivals with Knuckles.
 * MUCH more friendly with Mario.
 * Knuckles
 * Skeptical of Bowser.
 * Worried about leaving the Master Emerald unguarded.
 * Doesn't trust the Mario Bros..

Villains

 * Dr. Eggman
 * Seeks to utilize the Star Spirits as a fuel source for his new weapon.
 * Sees Bowser as nothing more than a ruthless monster.
 * Hard-Boiled Heavies
 * Fervently loyal to Eggman.
 * Often argue with one-another.
 * Have a different origin story; they were Eggrobos with self-learning AI that made their own modifications.
 * Ally with Metal Sonic later on.
 * Metal Sonic
 * Eventually realizes that Eggman is useless.
 * Manipulates Metal Bowser into joining him.
 * Metal Bowser
 * Created when Eggman captures Bowser.
 * Brainwashed by Metal Sonic.
 * Petey Piranha/King Boo
 * Betrayed Bowser to serve Eggman.
 * King Boo is the "smartass" of the two, while Petey is more humorous.
 * Eggman hates them both.

Other Characters

 * Wario Bros.
 * Working on salvaging Eggman's tech.
 * Clash with the others frequently.
 * Often fight with the Chaotix.
 * Princess Peach
 * Weary of Eggman's invasion.
 * Capable of fending for herself.
 * Worries about Mario.
 * Amy Rose
 * Constantly trying to hunt down Sonic.
 * Often wonders why she's attracted to him.
 * Yoshi
 * Fighting his own conflict against Eggman.
 * Teams up with Birdo and Team Dark.
 * Birdo
 * Massive crush on Yoshi.
 * EXTREMELY clingy.
 * Shadow/Team Dark
 * Concerned about Eggman's new weapon.
 * Willing to work with Yoshi.
 * The Chaotix
 * Forms a rivalry with the Wario Bros..
 * Trying to see what the Mushroom Kingdom is like, and often solves small cases.
 * Finds allies in L.K. and his friends.
 * Cream
 * Becomes good friends with Pearl.
 * Scared of conflict.
 * Pearl
 * Finds Chaos cute.
 * Often plays around with Big the Cat.
 * Big the Cat
 * Lazy.
 * Becomes a "father figure" of sorts to Cream.