Back at New York Comic Con, Marvel teased a number of upcoming events, including the next phase of the publisher’s X-line of books, Fall of X. Late yesterday Marvel revealed details for how Fall of X will begin: with a series of four Summer-shipping one-shots that may or may not spell disaster for Krakoa.

The new one-shots, subtitled X-Men: Before the Fall, will each be written by one of the regular X-title writers – Si Spurrier, Al Ewing, Steve Orlando, and Kieron Gillen – and will feature, among other things, a clash between Legion and Nimrod, the return of Apocalypse, and a continuation of the story begun in Sins of Sinister. Here’s the info on all four one-shots:

X-MEN: BEFORE THE FALL – SONS OF X #1
Written by SI SPURRIER
Art and Cover by PHIL NOTO
On Sale 5/3

Witness a battle between two titans of the X-Universe in X-MEN: BEFORE THE FALL – SONS OF X #1, written by Si Spurrier and drawn by Phil Noto. A man of innumerable personalities and powers vs. the most powerful artificial intelligence in this universe: Legion vs. Nimrod! With Nightcrawler in Orchis’ clutches, David Haller and his allies will have to confront the mastermind who destroyed Warlock and nearly took Krakoa with him. But Nightcrawler is not himself… and Legion’s allies aren’t all they seem to be either.

X-MEN: BEFORE THE FALL – HERALDS OF APOCALYPSE #1
Written by AL EWING
Art by LUCA PIZZARI
Cover by PEPE LARRAZ
On Sale June

It’s the long-awaited return of Apocalypse in X-MEN: BEFORE THE FALL – HERALDS OF APOCALYPSE #1, written by Al Ewing and drawn by Luca Pizzari. Not seen since the shocking ending of X of Swords, Apocalypse and his family have battled for survival in the harsh land of Amenth. Do they rule over this twisted world or do its demonic inhabitants rule them? And how has Apocalypse felt about the choices the Quiet Council has made in his absence?

X-MEN: BEFORE THE FALL – MUTANT FIRST STRIKE #1
Written by STEVE ORLANDO
Art by VALENTINA PINTI
Cover by DAVID BALDEÓN
On Sale June

It’s a mutant mystery for the ages in X-MEN: BEFORE THE FALL – MUTANT FIRST STRIKE #1, written by Steve Orlando and drawn by Valentina Pinti. A deadly mutant attacks an innocent small town but nothing is what it seems. Jean Grey, Cyclops, and Bishop are tasked with a routine mission but as they dig deeper, they uncover a hidden truth that will send shockwaves through mutantkind.

X-MEN: BEFORE THE FALL – SINISTER FOUR #1
Written by KIERON GILLEN
Art by PACO MEDINA
Cover by LUCAS WERNECK
On Sale July

And four Sinisters plot their next move in X-MEN: BEFORE THE FALL – SINISTER FOUR #1, written by Kieron Gillen and drawn by Paco Medina. In the aftermath of SINS OF SINISTER, all four Sinisters have been unmasked. They’ve gotten a taste of universal control but their true plans for mutantkind are just beginning…

The four new one-shots will culminate with this summer’s third annual Hellfire Gala, and the reveal of the results of the newly-announced X-Vote where fans can choose a new member for the team. But will there be a Krakoa left for them to represent?

Look for the first of the one-shots, X-Men: Before the Fall – Sons of X #1 to arrive in stores and digitally in May.