I guess that I know what will happen in incomming future chapters in following weeks
After reading the latest chapter of the manga, I only see two options possible for Kishi
1) Obito accept Naruto's hand then uses massive Rinne tensei, but while doing it he will get controlled by Madara who gained already SM from Hashirama.
2) Obito refuses and keep fighting while almost winning but exaggerating yourself make him weaken and then Madara via Senjutsu + Rinnegan takes control over him and force him to ressurect him while Obito will be too weak.
Either Way, Obito's End will result in Madara's ressurection... and then only becoming Ten tails host is left for Madara to become finall villain and main threat to Naruto world.
I believe first option to be most likely
Thanks for reading !
Please share your thoughts
Sage mode Madara:
Ten tails host Madara: