Snoopy Fan

One concept I did like about Sonic Underground is the idea of Sonic having siblings, and a mother named Queen Aleena

Sega don't really push for expanding the lore of the franchise like they used to, they're half in half out so to speak. Then you get the nostalgia fanatics who say Sonic should not have humans besides Eggman. Right, like we are expected to believe it makes any logical sense for Dr Eggman to be the only human. That old controversy is dead now, but I remember that being kicked up in the fandom a long time ago by groups of people who are okay with Super Mario having friends, but not Sonic, and it has been a toxic legacy in the Sonic fandom ever since and it's one reason why Sega is too afraid to get ambitious with their creations.