This all appears to be leading up to the return of Codemasters' one-time franchise character, Dizzy. While Dizzy was most prominent in America as the star of a few unlicensed NES games published by Camerica, including two for the Aladdin Deck Enhancer, the walking egg was genuinely popular in Europe. His games are essentially adventure games, involving wandering around 2D landscapes, solving puzzles, and saving the "Yolkfolk."
It's unclear from this teaser site exactly what Codies has planned. It could be as simple as a GOG-style re-release, or it could be an HD remake of a Dizzy game, or even a completely new game. We just can't glean much information from a picture of an egg carton.