One of my favourites is the Winter Soldier’s theme from the MCU. It’s impactful and sinister and I often listen to it when attempting a big lift at the gym:

[youtube]https://youtu.be/Kjanny4qMMk[/youtube]

Additionally, I really like the Netflix Daredevil theme:

[youtube]https://youtu.be/HoHTWjC2FuE[/youtube]

It’s a shame but aside from the obvious that’s already been stated, DC don’t have as many great themes that spring to mind as quickly as Marvel ones do.