I've also been interested in this issue since I was a fan of Guitar Hero on older consoles. I've had hopes for a revival of the series on PS5 for a while now, and it's a real possibility if the technical and legal issues are resolved. There's no official announcement yet, but if you look at the fact that Sony is actively supporting older franchises and considering remasters, the chances are there. Guitar Hero updates can be viewed here and you'll be the first to know the news.