Captain America: Civil War crossover.

This story is a sequel to A Beautiful New Age.

Being the first of her species to travel to another world, seeking to—and hopefully—make peace with its leaders, Princess Twilight and her friends see nothing but a bright future ahead for both Earth and Equus. It all seemed to be going so well.

However, after a devastating terrorist attack brings a mighty blow to the Avengers, Twilight and her friends are unwillingly placed as the next targets. Tensions arise between Iron Man and Captain America, and new players soon emerge into the battlefield, threatening to tip the tide into conflict amongst the shattered team.

To deal with the true threat behind the grand scheme, Tony Stark and Steve Rogers must put aside their differences before the inevitable comes crashing down on top of them…

Two sides of good clashing together, fighting for what they believe is right, breaking partnerships and ending friendships… human and pony alike.

Big shoutout to Shrekzilla for his amazing job on the artwork!

Sequel: Infinity Era

Avengers: Age of Ultron crossover.

Ultron’s plan had come to perfect fruition. There would be no more war, no more chaos, because the ones who caused it all would be gone. In just a short moment, the world would be saved from its true demon. Humans.

It would have all been so much simpler…if it wasn’t for them.

The Avengers.

As it is said, as it always will be, true peace can only be granted through countless innocent lives. In hindsight, the ponies were never that different from humans. Ultron’s plan is not yet over, and soon his strings will be severed…for the last time.

Big shoutout to Shrekzilla for his amazing job on the artwork!
Sequel: This War of Ours

In the same timeline from 'New Famillies', see quick moments of bonding between The Superheroes and the Ponies, between married couples like Gambit and Applejack, as well as Johnny Storm and Rainbow Dash, plus newer friendships to be formed.

Avengers: Infinity War Crossover (Chapters 1-100)

Avengers: Endgame Crossover (Chapters 101-200)

This story is a sequel to This War of Ours.

The worlds were changed. For better or for worse, many could determine. For Earth, scars have been left not only for humanity, but in the remnants of the Avengers. For Equus, wounds have been inflicted, and very little has been done to heal. Both the ponies and the Avengers have agreed to let time determine their fates.

They waited too long. They weren’t ready. Neither Earth nor Equus could have prepared for him.

Caught in the midst of a cosmic terror unlike anything they have ever experienced, the Avengers and the ponies of Equestria must do whatever it takes to push back against the tide that threatens both of their worlds. If they fail to do so, then both Earth and Equus remain teetering on the brink of destruction.

The culmination has arrived. The Mad Titan has waited so long for this moment. Long live the Infinity Era.

Dramatic Readings by Mr. Snarky!
Episode 1 - https://www.youtube.com/watch?v=jdLMU4aCo9g
Episode 2 - https://www.youtube.com/watch?v=_QGcLzon7z4&feature=youtu.be
Episode 3 - https://www.youtube.com/watch?v=AuV4eE1P8jI&feature=youtu.be

Oh, look! A tvtropes page: https://tvtropes.org/pmwiki/pmwiki.php/Fanfic/EquestriasAvengersOfJustice

Cover art by Shrekzilla.

Sequel: The Apple Doesn't Fall Far From Home