Pentakill 2nd Album Anyone?

So I was sitting down listening to Deathfire Grasp (R.I.P. Dfg) and had this idea. What if the Pentakill band brought in some of the old Metal/Hard Rock singers? I was thinking about Ozzy,Kiss, and most of the mainstream metal rockers. Ik Riot mentioned that it won't come out in awhile, but this is just an idea I had. You guys feel free to name some below if you want. What do you guys think though, would it be a cool idea? Or am I talking nonsense?