The official Sonic the Hedgehog 4 website has revealed Sonic 1 badnik Newtron in motion, we’ve seen him before in the leaked footage but now we have a bit of text with him and some concept art –

Newtron surprises Sonic again using optical camouflage to try and blast Sonic. He can also transform into a rocket and charge towards Sonic.

So unlike Motobug it appears he doesnt do anything new but its still cool to see him make an appearance again.

Concept art and animation at the official Sonic 4 site

Thanks to Eggman123 for the heads up!