In 2006, New Line Cinema added five days of reshoots for Snakes on a Plane, six months after principal filming had wrapped. The new shoots helped change the film’s rating from PG-13 to R, courtesy of, among other things, the addition of the line “I have had it with these motherf****** snakes on this motherf****** plane!”
It was an early and still one of the best known instances of a film being altered in post-production over internet consensus. The forthcoming Sonic the Hedgehog is likely still gunning for a family friendly rating.
Of course, the bizarre CGI take on the 90s character was one of dozens of glaring issues with the two-and-a-half-minute trailer, but it may well be the easiest to address without extensive reshoots.