Oh, I am very interested in hearing your Sonic 3 pitch!
Weeeeeeell, if you insist...here are my ramblings...
This is mostly Shadow-related ideas.
For years, "Project Shadow" was believed to just be a conspiracy theory, not even high ranking officials like Walters believed in its existence...yet here it is. No one actually knows much about it, all the information was erased decades prior.
Commander Walters sees this as an opportunity. After what happened in Green Hills, G.U.N realized that the only way they can possibly stand a chance against any potential alien threats, is to fight fire with fire, meaning...they will use Shadow as Earth's perfect super soldier.
G.U.N's military forces raid Green Hills, countless armed soldiers ready to capture these aliens and arrest the Wachowskis for treason against humanity, using Shadow as muscle. Due to their sloppy teamwork, Team Sonic is no match for the Ultimate Lifeform.......however, this is when Shadow turns on everyone and announces his plan to exterminate humanity over what they did to him and Maria.
So, in a pretty awkward moment, Walters has to once again beg Tom and his family for help. Everyone becomes temporary G.U.N agents (Wade included), with cool weapons and armor for the humans.
This is just my idea for how the first act of the movie could go. So far, I don't know what role characters like Robotnik and Agent Stone could play, as well as potential newcomers like Amy Rose or Metal Sonic.
But it could lead to an awesome climax where Super Sonic and Super Shadow have to stop the ARK (now a secret abandoned colony inside the ACTUAL MOON) from crashing towards Earth.
I think Shadow would actually survive thanks to Sonic. After everything, Walters offers Shadow to help protect Earth, not as a weapon, but as an agent......to which Shadow would respond by punching him in the stomach and saying "pass". He would rather take some rings (gifted to him by the boys) and go explore the universe in order to find new purpose.
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