Icarus
Phantasy Savior
Honestly they could pull a Mania Tails where he could get his super form with the regular Chaos Emeralds...Removing the time travel completly defeat's the purpose of the game. Also, the chaos and sol emeralds? The time stones are enough, cuz you can probally make a pseudo-super sonic out of them. Like, sure, the chaos emeralds could maybe make sense, but the sol emeralds just woudnt work. It doesnt even make sense for both gameplay and the storie. Tails is a good example of this. In the 2011 port, Tails had no cutscenes of his own, and this was both good and bad. Bad because his playthrought became dull compared to sonic's, but it was also good because it wouldn't mess with the timeline (before anyone says "but it's just a remake, dumbass!", no one even knows what's f*cking canon in this timeline at this point).
And yeah, canon makes no point in the serie anyway, they could even add Desert Dazzle as a bonus zone.