Why was Sonic The Hedgehog's original movie design changed?

When the first trailer for Sonic The Hedgehog was revealed in 2019, the internet erupted into disgust at his creepy new look, prompting a total redesign
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Why was Sonic The Hedgehog's original movie design changed?

Sonic's original creator 'feels weird' about design after new trailer

The Sonic movie director talks redesign: It was pretty clear on the day the trailer was released that fans were not happy