One punch is a parody that is also in love with the genre its mocking. Its whole joke is now setting up the exact same type of story, running it 99% through the same tropes, then ending it in a whimsical way while still having the epic battles, just with over the top side charectors until the very last minute.

In fact, the anime is such a big fan of its own manga, it has also shifted to using static images as much as possible.