Early internet users speculated about a hypothetical Sonic the Hedgehog sequel, with some predicting features like multiple paths and a two-player mode.

The commonly cited June 23, 1991, release date for Sonic the Hedgehog, introduced in Sonic Jam, is inaccurate because multiple early internet forums discussed the game before that date.

An early internet user struggled to get past the first boss in Sonic the Hedgehog.

Rumors circulated that Sonic 2 would be a CD-ROM game, and the delay of the Mega CD's release in the United States was speculated to coincide with Sonic 2's launch.

An early internet user disagreed with Sonic 2 being a CD-ROM game, believing CD-ROMs were novelty items that the general public lacked money or interest for, and that Sega would alienate customers by releasing it on that format.

An early internet user was confused about the number of Chaos Emeralds, believing there were only six instead of seven.