I stress that those Metal Sonics at the end MUST be mass produced and that there MUST be a TRUE Metal Sonic we haven't seen yet.
I just can't accept Metal being downgraded to some nameless jobber since he's anything but, especially against Amy.
That one with metal Sonic looks interesting. Maybe that’s the plot of Sonic 4? Eggman takes over an alien planet with Metal Sonic’s help. And Amy recruits Sonic to stop him
It's likely that the chaos energy explosion sends Eggman into the future and he conquers the world by making a Metal Sonic. Amy steals some of his tech (hammer) and goes into the past, but Eggman sends Metal Sonic Drones after her, which will destroy any "hedgehog shaped" figure they come across.
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I just can't accept Metal being downgraded to some nameless jobber since he's anything but, especially against Amy.