^Possibly. We don't know, all we know is that there is a genesis emulator and that's likely the entrance for it.
Ok there is only one thing about this game that bugs me and it's the exclusion of other classic characters beyond Sonic, Tails, Metal Sonic, and possibly Robotnik. Every level that they've chosen from the genesis era had something to do with classic Amy, Knuckles, and Robotnik. Metal Sonic race, you go and save classic Amy from Robotnik, it's your prize for winning the race. Sky Sanctuary, Knuckles runs across the bridge and presses the button for you, also it's from a game called "Sonic & Knuckles." And with the Death Egg Robot why didn't they have Sonic chasing Robotnik through the corridor? They could have easily thrown him in there. Chaotix however I could care less about, but it'd still be cool to see them in class form. Regardless my point is there are 9 supporting characters, 6 of them had classic incarnations, 3 of which were important, and we only get to see Classic Tails. Hell if they really wanted to go above and beyond they could have made up classic incarnations for Rouge, Cream, and Blaze (funny how the modern girl characters in this game don't have classic versions). That'd have been interesting.
As I've expressed through this thread, I love this game. I love the idea, the execution, pretty much everything. This is the one thing that kind of ticks me off. Not in a huge way, but still. I mean I understand that Modern Sonic has been present for 12/20 years, and as such there is more of him, but it'd have been a nice nod to those of us who have been here since the classic days. Classic Sonic and Tails look awesome. I bet they could have done wonders with Amy and Knuckles. I mean, looking at Modern and Classic Tails side by side, I now realize that Modern Tails really looks quite Derp with his mouth open. Classic Tails does not.
On a positive note though, damn have they done some serious work with Sky Sanctuary. Modern Sky Sanctuary is all over the place. It's almost the perfect modern Sonic level. And Seaside hill looks quite interesting. Good work Sonic Team.