Yuji Uekawa defined the look of the modern Sonic we know for the Sonic Adventure series, launched in 1998. The illustrator left behind the more childlike appearance of previous outings in favour of a taller, meaner and cooler hedgehog fit for a new era. Satoshi Okano's contributions to the modern Sonic should also be acknowledged.

Sonic the Hedgehog 4 could benefit from incorporating vehicles like the Fast & Furious franchise. Including vehicles will add new action and energy, helping the film stand out and attract audiences. Integrating vehicles would pay tribute to Team Sonic Racing and offer fresh dynamics to existing characters.