History NightmareFuel / SonicTheHedgehogMegaManWorldsUnite

* The fact that [[spoiler: Team Dark, G.U.N, and the Mayor of Mega City [[KilledOffForReal actually]] ''[[KilledOffForReal did]]'' [[KilledOffForReal die]] in the crossover. Many were expecting Shadow to show up to pull a BigDamnHeroes but by the end, it's made clear that that wasn't the case--he really was offed for the reminder of the story. This does result in a CrowningMomentOfHeartwarming though, as once the timeline is reset, Sonic immediately calls Shadow to make sure he's alright.]]

* The fact that [[spoiler: Team Dark, G.U.N, and the Mayor of Mega City actually ''did'' die in the crossover. Many were expecting Shadow to show up to pull a BigDamnHeroes but by the end, it's made clear that that wasn't the case--he really was offed for the reminder of the story. Once the timeline is reset, Sonic quickly calls Shadow to make sure he's alright.]]

* Sonic and Mega Man being [[MindRape transformed]] into Sonic Man and M'egga Man.

* Sonic and Mega Man being transformed into Sonic Man and M'egga Man.

* The revelation of [[spoiler:even if the heroes can stop Sigma, it may be to late to restore all of the worlds.]]
** [[spoiler: Absolutely NOTHING can stop this mess that Sigma has caused despite his defeat. He's siphoned too much energy from the combined worlds that it cooled the core of the fused planet to the point it begins imploding. The heroes try to at least contain some of the damage by trying to close the Genesis portals, but it's all in vain. Night's Loop de Loops have no effect, Billy Hatcher can't contact the Chicken God for help, Amantersu's Celestial Brush is useless, M. Bison's Psycho power can do a thing to the portals and the magic users find their powers no longer work. Even Sonic and Mega Man's Chaos Control can't do the job, meaning it truly is completely hopeless. The only thing everyone can do is at least try to evacuate to another world on Vyse's ship, but even then there's no guarantee it'll help or that they'll get out in time. They were mere seconds away from biting the dust...]]
** [[spoiler: If that wasn't bad enough Eggman and Wily actually ''succeeded'' in taking control of the Unity engine and were more then happy to let the current reality be destroyed so they can re-write it to their whims. Thankfully Xander stepped in to prevent that from happening.]]
* The fact that [[spoiler: Team Dark. G.U.N and the Mayor of Mega City actually ''did'' die in the crossover. Many were expecting Shadow to show up to pull a BigDamnHeroes but by the end, it's made clear that wasn't the case, he was really offed for the reminder of the story. Once the timeline is reset, Sonic quickly calls Shadow to make sure he's alright.]]

** [[spoiler: Absolutely NOTHING can stop this mess that Sigma has caused. Chaos Control, the Celestial Brush, nothing. Billy Hatcher can't contact the Great Rooster, M. Bison's Psycho power can do a thing to the portals and the magic users find themselves devoid of it. The only thing everyone can do is at least try to evacuate to another world on Vyse's ship, but even then there's no guarantee it'll help or that they'll get out in time. They were mere seconds away from biting the dust...]]

** [[spoiler: Absolutely NOTHING can stop this mess that Sigma has caused. Chaos Control, the Celestial Brush, nothing. They were mere seconds away from biting the dust...]]

* Alright, Sigma-2 has finally gone down! Good work, team, let's all go for milkshakes. ...Wait, wait, hold on. [[spoiler: '''Sigma-''3'''?'' Well, um, alright. This isn't over, but he's back to normal size. No need to panic. We've got this. ''--Oh.'' Oh, dear, did he just...''[[DidYouJustPunchOutCthulhu one-shot Gore Magala?]]'' That's... That's actually quite horrible. No worries though, Ammy is on the way, and her reality-bending properties will surely-- '''''[[BeyondTheImpossible and he just no-selled the Celestial Brush.]]''''' You can panic now.]]

* Alright, Sigma-2 has finally gone down! Good work, team, let's all go for milkshakes. ...Wait, wait, hold on. [[spoiler: '''Sigma-''3'''?'' Well, um, alright. THis isn't over, but he's back to normal size. No need to panic. We've got this. ''--Oh.'' Oh, dear, did he just...''[[DidYouJustPunchOutCthulhu one-shot Gore Magala?]]'' That's... That's actually quite horrible. No worries though, Ammy is on the way, and her reality-bending properties will surely '''''[[BeyondTheImpossible and he just no-selled the Celestial Brush.]]''''' You can panic now.]]