Sonic 2017's Official Title is Sonic Forces, Sonic Mania Delayed to Summer

SEGA announced a pair of updates regarding the two Sonic the Hedgehog games the publisher has in development.
The first gameplay of modern Sonic in Sonic Forces is coming soon.

I hate when a new mediocre Sonic game comes out and Sonic fans bring old games everyone hated and treat it like the holy grail. NO, Sonic 06 was not a “misunderstood

Sonic Mania Review

Sonic Superstars Confirms 60 FPS on Switch : r/NintendoSwitch

Sonic Forces Info Drop

SXSW 2017: Project Sonic 2017 is Sonic Forces / Sonic Mania delayed to Summer 2017 – Blueknight V2.0

Boom!Sonic approves the Custom Hero by SuperSentaiHedgehog on DeviantArt

Sega Announces new Sonic The Hedgehog game Ahead of E3

Sonic Frontiers - Wikipedia

My Nintendo in North America Adds New Sonic Rewards

SONIC MANIA Delayed Until Summer 2017 — GameTyrant

Sonic Mania Preview - Knuckles Returns To Flying Battery Zone In Newest Sonic Mania Trailer - Game Informer

Sonic Mania delayed to summer 2017 [Update] - Gematsu

Sonic Frontiers developer says it isn't an open-world game - The Verge