Silver's future is a location that appears in the Sonic the Hedgehog comic series and its spin-offs published by IDW Publishing. It is the time period of Silver the Hedgehog, occurring approximately two hundred years after the present era of Sonic's world. The nature of this timeline often changes due to Silver's time traveling altering the past. However, it is usually in differing states of turmoil due to various unrelated events that occur in the past, the reason Silver time travels in the first place.
The Fate of Dr. Eggman
A previous version of Silver's future saw the world conquered by the Eggman Empire. In this timeline, everyone was living in fear and choking on polluted air. This was changed after Silver the Hedgehog went to the past to aid the Resistance in combating the Eggman Empire. When Silver later returned to his time however, he found his world in another dire situation; while the Eggman Empire had vanished, the world had become barren of any organic life and machinery, with only water and sparse metallic plant life remaining. This prompted Silver to return to the past once again to solve this crisis.
All or Nothing
Some time after Dr. Eggman had his memories restored, he created a mechanical substance called the Metal Virus that infected several people around the world, turning them into Zombots. His research showed that the virus would eventually become unsustainable and would cause the Zombots to disintegrate; the doctor predicted that this would occur two hundred years into the future, something that Silver deduced had already happened in his time.