The Sonic Central broadcast confirmed the rumored collection of the Sonic collection of games. It is called Sonic Origins, and it is going to be releasing next year.
The collection includes Sonic the Hedgehog, Sonic the Hedgehog 2, Sonic the Hedgehog 3 & Knuckles, and Sonic CD. Apparently, Sonic 1, Sonic 2, and Sonic CD is in widescreen, suggesting that they may be the Taxman versions.
As for platforms, they only said that they are coming to “the latest” ones. They also said that more information is coming soon, so you will really want to stay tuned.
UPDATE: The Sonic Social Media Manager just confirmed that Sonic 3 & Knuckles will also be widescreen!