omg i think so too. And hashirama is probably the father of madara. Sage of the six paths is the grandfather of nagato and sasuke. Orochomaru is the brother of kabuto and danzo is the father of sai.what if minato is the son of tobirama? Like naruto. Before he doesn't know that his father is minato.
In the mangga series, we didnt know the origin of minato. So like tobirama, minato can use ftg.
What if = ei. Minato namikaze+uzumaki kushina = uzumaki naruto
what if = ei. Tobirama senju+ unknown namikaze = minato namikaze