Long-term? Yes. But on an ongoing basis, I think not; it's iffy enough having so many other Kryptonians around (I have a way around that conceptual issue, but I'm keeping it close to the chest--Superlad93 knows what I'm talking about), but a whole new existing Krypton? No way. As it is, it belongs alongside other eternal Superman problems like neutralizing Kryptonite and reforming Luthor.