Honestly? I think Nega will be shown in a later issue, but until SEGA gives the go-ahead, we may have to wait quite a while before we actually get to see Nega, instead of just getting little references to him. He may use the Egg O' War as his base, due to it being in the Sol Dimension (If I remember correctly). But; hey, only time will tell.
Honestly? I'd like to see a Sonic Generations or a Sonic Colors ark. I think it would be cool to see the old SatAm/Underground/comic design of Robotnik again. Maybe seeing the other character's reactions to seeing Sonic use the Wisp powers.
I'm thinking more so about consistency. Jaleel has voiced Sonic recently in the fan film (TheonenoonetalksaboutbutIactuallykindalike). He did manage to replicate his rendition of Sonic while making the character sound older. I think that Roger Craig Smith does a fantastic job voicing Sonic, I just think Roger's voice is right for that particular Sonic-verse.
"No copyright law in the universe is going to stop me!"
Sonic - Sonic Colors
"What is a man? A miserable pile of secrets!"
Dracula - Castlevania: Symphony of the Night
"It's dangerous to go alone. Take this."
Cave Man - The Legend of Zelda
"We shall greet the morning here... Together"
Anju/Kafei (I can't be bothered to figure out which one) - The Legend of Zelda: Majora's Mask