Sonic the Hedgehog: A New Superstar is a five page preview of Sonic the Hedgehog in an 1991 issue of Game Players Encyclopedia. The article mentions that the game they are previewing is a preliminary version although it looks very close to final. However, page 22 shows the Green Hill Zone rolling ball and gives a description of its use: "Don't underestimate that big ball. It can squash our hero like a bug. The slightest touch will start it rolling, so Sonic shoves it left and keeps moving." The rolling ball was likely removed towards the end of the games development cycle.
This is a Strategy feature which is featured later on in the magazine. It gives tips on how to get through each Zone.