Madara's Mangekyō Sharingan Abilities

To cut the introduction short: You all know what MS is and that upon the awakening it grants user 3 abilities, one of which is Susanoo if the user awakens the other two abilities in his left and right eye.

Reminder:

Spoiler :

Itachi Uchiha: Left eye had Tsukuyomi. With right eye he could cast Amaterasu
Sasuke Uchiha: Had Amaterasu in his left eye with Enton: Kagutsuchi ability in his right eye.
Obito Uchiha: Had a long range Kamui ability in the left eye, short range Kamui in the right eye.
Shisui Uchiha: Kotoamatsukami in each eye.

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One of the Uchihas who never showed his MS abilities was one of the most powerful ones - Uchiha Madara. We know that when Uchiha awakens MS in both of his eyes or the ability of both of his eyes he is able to perform Susanoo. Madara is one of the rare Uchihas to be able to perfom the highest version of Susanno - Perfect Susanoo or Complete Body Susanoo. Whatever you like better. Suggesting that Madara actually had some unique MS abilities in his eyes.

So what are they?

Theory 1: Enton

Spoiler :

During the 4th war we saw Tobirama saying:

Spoiler :

he never saw a Kagutsuchi that strong before, implying he saw one already. Since Enton Kagutsuchi is an MS ability, he must have seen another MS user with that ability.

Back to what Itachi said:

Spoiler :

Both Izuna and Madara awakened the MS. An eye technique which was never achieved by any other clan member. Since we know that Tobirama was fighting Izuna and Madara in the past one of them must had Enton as an MS power. So back in the past Madara had already a 50% chance of having it.

Back to what Madara said:

Spoiler :

What my brother left me are his eyes and their power.

So technically Madara should have Enton.

Theory 2: Time Control

Spoiler :

OVA - Naruto Storm Generations

This is OVA from Naruto Storm Generations released back in 2011, I think. It shows us a fight between Hashirama and Madara. And is actually a fight that led to a huge theory back in the days that Madara has control over time.

Um forward the video to about 3.00. People were saying that Madara's ability is to rewind time which gave him options how to deal and counter Hashirama's offense. Should be noted that this so called ability works almost exactly as basic Sharingan perception though it should also be noted that it is used differently. Kinda.

This ability if true, could actually clarify some things regarding Madara.

1. How he used Kamui immediately after implanting the eye. Cause he is already skilled with time space jutsus.
2. How he was able to counter FTG while he only had SM.

That is it. I have no other theories of his abilites.

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What do you think Madara's eyes abilities are? And why didn't he use them?