Hi @osfranco,
Superhero is an older theme, it was launched five years ago and was last updated two years ago. As such, it hasn’t been tested against the latest version of WordPress. You can definitely still use it if you like the design, but be aware that this is an older theme that’s no longer actively maintained. There may be issues.
I’d encourage you to choose a newer theme to avoid any issues popping up. Toujours and Coherent are two nice, simple blogging themes that you might like. If you let me know what particular features you’re looking for from a theme then I’d be happy to offer other suggestions also.
