Ghosts of the Future

Ghosts of the Future is a Sonic the Hedgehog fan comic written and illustrated by Evan Stanley (a writer and artist on the official Sonic comics, both Archie and IDW versions), co-written since issue 10 by Tom Campbell (aka Okida, the creator of Sonic the Continuation), and colored since issue 18 by Reggie Graham (another IDW Sonic artist). It started on September 24, 2007. Presumably due to Evan Stanley being busy working on the official Sonic franchise, the comic has been in a quiet hiatus since January 7, 2021.

Evan Stanley’s DeviantArt page: https://www.deviantart.com/evanstanley