I only see Michael and Trevor coming back if its a prequel set in the 1980s midwest. It would be cool if the protag of the new game sets up Michaels first heist. After Michael talking about it durring the Paleto bank heist it would be inersting and also when Trevor delivers the cars to Devin he talks about when they first met. Would be interesting if a new GTA game includes them as a cameo or as heist members as long as its a prequel and not this modern day sh*t.
You don't even use the internet that much