Board Thread:Theories and Speculation/@comment-995176-20161007184843/@comment-3568954-20161009170023

you are assuming that they don't still exist. its just none of them are really that important to the overall story. for all we know tobirama could have had a bunch of kids. for all we know hashirama could have had multiple kids. and who said that tsunade's parent was the one born when mito's seal nearly broke.