After Ten Thousand Years in Seclusion, I Return Invincible

[Powerful protagonist + fiery battles + a cast of heroes + a later struggle for supremacy]

Fang Ye, already the Human Emperor, is in high spirits as he prepares to marry the peerless Empress and spend their wedding night together. Just as they're about to enter the bridal chamber, the damn System suddenly binds itself to him, claiming he isn't invincible enough, and drags him into a separate dimension to cultivate. From that day on, he vanishes from the world.

More than ten thousand years later, Fang Ye emerges in despair, only to become the world's sole savior.

(The beginning is a little rough, but it gets more and more exciting later on. The main storyline begins after 100,000 words.)