The trailer for Sonic The Hedgehog was released and the world wide web went nuts… But not really in a good way. Many people complained about how Sonic looked. And hey, your complaints were heard.
It turns out that if they do have to push the movie back, it would get the movie out of an already busy Thanksgiving time. Paramount would possibly have less competition against themselves with the release of Terminator: Dark Fate scheduled in November (one week before Sonic was intended to be out).
Forbes.com has the scoop here.