Comment by Myriad Eclipse on sgrey

Ok, so the Nano Machine's original plot should be ending soon. I remember there should be a lot of battles one after another and then the Martial G** dude from the main antagonist clan will show up and MC will beat him up. However, it will turn out that the Six Martial G** clan are actually time travellers from the far future and at the last minute before MC can defeat the final villain, the antagonist will initial time travelling thing and will teleport back to the future and take MC with him without concluding the battle.

Basically, originally the Demon Sect should dominate the world and MC would've risen to be the leader of the cult even without the interruption. In the future all biggests sects have transformed into mega corporations and continuted to exist like that, while still doing martial arts. However, the Martial Six Clan after the invention of time travel went back in time into key points and killed all the promiment historical figures, established their own clan in the past and became the most prominent power that controlled the world in the future, which is basically their full plan. The guy who originally gave MC the nano machines was his super distant grandson, from something like 2000 years into the future. He figured out that someone messed with history and went back to fix it and he chose MC as the best person to do that.

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So, MC time travels into the future, but not the future where the guy who gave him Nano Machines is, he time travels 200 years before that time (or something close to that). Nano Machines are already invented, but they are at most generation 3 or 4, while the MCs Nano Machines are generation 7. In addition, the martial arts also declined and MC as the OG OP Demon G** is basically unrivaled as the one who whield original intact martial arts and his nano machines can control all technology around (and I think that also includes some other nano machines inside other people). 

MC finds out that his descendants, while still hold power, gradually declining and also went astray and even plotted against him. Turns out that the guy who time traveled to the past couldn't leave, so he secluded himself in some cave for hundreds of years and was working on some stuff. But he couldn't do that alone, so he found himself a helper and also built a computer with an AI to help him do his research. But that helper betrayed him and the AI decided he wanted to be properly alive and went all evil, partially taking over the world in the future. So MC goes on a mass-murder spree and basically ennihilates all enemies in the future, helps his descendents recover lost martial arts and training methods and sets his family on the path of world domination. 

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BUT, there is a plot twist!! In the future, the Earth is being invaded by some aliens through dimentional portals, and everyone is fighting those aliens! Turns out they are some conquering species who keep invading other planets and enslaving or killing everyone and stealing all their cr**. So MC, as a good grandfather goes through that portal to mass-murder those aliens and bring peace to his decsendants. And what we find out, those aliens many years ago had a super king, who had a super son and that super son was super powerful, like the most powerful warrior those aliens have ever seen. And that super son should've been the next super king, but some relatives have plotted against him, and assasinated him, took over the power, and started rulling the aliens like the tyrants they are.

BUT, there is a plot twist!! That super power son did not die! He used either some kind of super tech or super magic and accidentally dimentially time travelled to the Earth to the past! And! He became the most powerful martial artist of the past and established a sect called... Heavenly Demon Divine Cult and became the first OG Heavenly Demon!! Dum DUM Dum!!! And turns out, he is still alive, but became so powerful that he went to some other realm or planet because he wanted to fight stronger opponents. 

(you know by now)

So, MC goes on another killing spree, fixes the goverance of those aliens and goes back to Earth. Then he time travels back to his time, but not before removing various plots that the OG villian, the Six Blade Clan set up throughout the history. He makes it so his grandson who time travelled to the past can be saved and killed all traitors and such. 

Eventually, he became the most famous cult leader in history, married that woman who was with him from the start, had a few children and grandchildren, set the whole cult on the path of success. And after hanging around for something like a 100 years, he made sure the cult is doing ok, faked his death from old age (he  basically so powerful he does not age afaik, at that point), took his waifu and left the planet to the same place as the OG Heavenly Demon, so that they can battle one another because they are both so OP, they are bored since no one can fight them.

And that's the Nano Machine