well I can
all the answers lie in the demonic statue, when all the beasts are put together inside it the weilder of the rinnegan and hence master of the gedo mazo must get unbelieveable power, strong enough to destroy nations in an instant, revive dead souls from long ago and so on... i bet you that madara even created the gedo mazo , a medium to use hashiramas powers through hashiramas dna, thats why nagato summoned it in his moment of desperation, madara created the mazo and put the rinnegan and the means to use gedo mazo inside nagato, so that he would use its power instinctively at the time he would need it most
so basicly, your saying that madara created a real clone of himself useing zetsu's powers and gave nagato the rinnegan and the gedo mazo and told him the goal to gather all of the tailed beasts in hopes of him being revived later? thats like knowing your walking into your death, and if he knew that much he was going to loose then why fight the 1st in the first place. plus he did not consider the failure of that plan? if what your saying is true then madara relayed on nagato way too much as gathering all of the tailed beasts from different nations and them not doing anything about it is really much like 1% if not 0. and the result of that is the current war.
and he should have known that the 5 great nations would declare a war against nagato (or the akatsuki) which leads to his plan failure.
and if what your saying is true, which i suspect it is, then in order to create a white zetsu in the first place he needed hashirama's DNA which he could not passably got in the midst of the fight and got the time to create a new being without hashirama noticing it or anything like that. as any slip against hashirama will get you killed.
and even if he knew that 80000 white zetsus will be created later its obvious that the 5 nations will be victorious.
basically what i'm saying is if that WAS madara's plan to revive him self later..it fails. and it will fail. (or it already did)