Idea for Sonic game: Sonic Corruptiom

[MetalSkulkBane]

(I might have to come up with different tittle, to easy to make jokes).

I'll mostly covers story, with few gameplay ideas.The game would have 3 playable characters: Sonic, Shadow and Silver. Main plot is about Eggman looking for some ancient weapon and most of the game would take place running through ruins of the once mighty civilization.

Chapter 1 would start with friendly race between hedgehogs, perfect way to introduce characters and include tutorial into a game. After Sonic wins they somehow learn about Eggman plans, hedgehogs split and adventure begins. Chapter 1 would be about Sonic vs Eggman, simple classic fun. But 3/4 into the game Eggman find the weapon called "Corruption" and finds out warning that it's too dangerous too be released. He send Metal Sonic to slow down our hero, but after humiliating defeat, Metal ignores Eggman's orders and opens the vault, merging with creature inside into Metal Corruption. Corruption would be energy being that can control any machine and just wants to destroy everything. So the last levels are about stopping it.

So far story nothing terrible, but nothing new. Chapter 1 is simple and easy to jump in.

Chapter 2 starts with Shadow running away from something and talking to Rouge through a com link. He finally hides in his secret base. Pursuers he was running from are robots controlled by Corruption, lead by Omega. And the Rouge he was talking to is a simple computer AI that Shadow named that way.
This chapter takes place in the future. Five minutes after Ch 1 ended Corruption just stared walking without Metal's body and no one was able to stop it. Now world is in ruins and we never make it clear what happens to everyone. Let's just say that Shadow goes "Old Man Logan" and suffers a terrible Survivor Guild Syndrome. Soon he finds Silver. All of this is caused by someone is messing with time, but some weird machine (let's call it Chrono Anchor) keeps pulling Silver back here and he need Shadow's help to destroy it. And of course it's inside Omega's base.

So this chapter is all about Sonic Apocalypse, dark, but not "gritty" as everything would be kept in a subtext and implications. but given some emotional arc as Shadow needs to find a courage to fight again, after he lost everyone he cared for for second time.

Chapter 3 takes place in the past when that mighty civilization was alive. You might be realizing that I want to pull out "Sonic CD/ Ocarina of Time" here. Time travel is a perfect way to reuse levels. First you go through ruins and pretty forest, then through ruined world and burned forest, and finally through just just seeded forest and ruins before they got ruined. Maybe in Present there is a frozen lake and in Future it melted and you can explore the caves. Maybe Sonic will walk through Hedgehog-shaped hole, and later Silver will be one to make it by crashing into something. This kind of shenanigans.
Anyway, Silver befriends Scientist Guy and learns that villains behind everything is Eggman Nega (good excuse for fighting badniks in the past). Nega tricked Scientist Guy into sharing his awesome technology and with it he created Corruption. Silver is too late to stop him and what worse, Nega brought it a perfect vessel from the past. So after Metal Corruption in Ch1, Omega Corruption in Ch2, this one would end with Gizoid Corruption. Silver manages to capture Nega and split Corruption from Emerl, but is unable to destroy it. He just seals it in a vault, the same one Eggman will find in a future. He sulks that he failed, but Scientist points out that he saved countless lives of his people (implying that in Original Timeline they sealed Corruption without Silver, just with heavy looses). And that's worth something.

Last Chapter start imminently after Ch 1. Sonic thinks he won, suddenly Corruption starts walking without machines ("Pure Corruption") and nothing Sonic tries seems to hurt it. But this time he finds he gets a present that was apparently waiting for him thousands of years. Weapon made by Scientist Guy that can destroy Corruption, but can be only powered by running really really fast. You can guess the rest.

And that's my idea. Assuming that gameplay part would hold up I think it would satisfy most fans. It has room for expansion (maybe Tails & Knux in Ch1 or more exploring of Apocalyptic World), but I wrote it thinking about budget constrains and focused story.

[DCFCSonic20]

I saw something interesting on the Sonic Fanon wiki, which looks plausible for the next mainstream Sonic game. 

http://sonicfanon.wikia.com/wiki/Sonic_Revelation