Board Thread:Theories and Speculation/@comment-31338621-20190501030435/@comment-32685487-20190502215843

Not much stronger. He didn't have something like a KKG natural or gifted, and if he was to live he wouldn't have had Kurama in him either since he would have just sealed the other half back into Kushina. So he would maybe get better use of Sage Mode and finish learning to use his chakra nature with Rasengan and that's about it. Prime Nagato, Prime Hiruzen are 2 examples of characters who would still be above him though.