That will be pretty fcking terrible imo. I want Madara to fight the protagonists. I thought he would be a total anomaly and work outside the cycle. He is the being that united 2 reincarnations into one after all.
In the end, Madara is nothing of its own. He is just a clown, and shoddy imitation of Kaguya and all that Shinju crap...
The Tsukuyomi plan is not his either, so it really destroys Madara on all aspects as a "fine villain" imo. I really lost respect to what Kishimoto just made him out to be. And yet again, he also becomes this "YOU WILL NEVER DEFEAT ME MUAHAHHAHA" -type of villain.
I have a bad feeling that Madara is going to be destroyed as a character. Both figuratively, and ofc literally.