If you're at all familiar with the DCU, you'll want to check out
Time and Tide by
mtgat. I had the honor of beta reading this, and my first reaction was a literal jaw-drop.
Because wow. This is the kind of superhero story I adore. Where heroes get to be big damn heroes, and there's plot and action, but it's most of all about being a parent, or being a spouse, or being a partner, or being a friend. It's also about how heroes feel about their heroes.
(Warning: It has some spoilers for the later seasons of JLU. So hurry up and finish up watching if you're in the middle of doing that, so you can read this fic, because it's gorgeous.) [ETA: not that spoilery, my whoops. It's set early in the last season. Mild spoilers.]