Again. We dont even have engine info released yet. So we dont have part data yet either.
But if its a Ls3 or variant of, I expect the GM hot cam will be popular but I dont think i will keep your warranty. I heard that Gm will have a full accessory line from the launch, but it wasnt clear if that meant performance or bling. I think it was bling and little things for performance like the current Mustang has (Drag Pack, Handling Pack), which basically will prolly consist of a Ripshift, axle-back exhaust option, springs/shocks/struts option package, and some form of GMPP CAI or ram air option. That just guess and speculation.
But stick around on 5th gen forums and you will learn as we all do.