Vertigo's last two remaining series, Fables and The Unwritten, will be involved in a crossover in May.
Source: MTV Geek
For the past several years, dark wizard Dan Didimort has been executing a plan to destroy DC's Vertigo Comics imprint. Using unforgivable curses such as Terminatus Bergerus and Hellblazerus Cancellatus, Didimort has decimated the once proud comic book line, moving most of its notable properties into the DCU and driving away talent. In fact, Vertigo's lineup has been reduced to only two comics that we can think of off the top of our head (which is the extent of the fact checking we plan to do on the matter): Fables and The Unwritten.
Obviously, those two comics are the next targets for Didimort's wrath, which has been raging ever since Didimort failed to kill the career of young wizard Chris Roberson following an anti-DC Twitter rant by Roberson which decried the treatment of celebrated wizard and headmaster of Rorsharch's School of Witchcraft and Wizardy, Alan Dumblemoore. Coincidentally, it is believed to be the work of Dumblemoore himself that may save Fables and the Unwritten.
According to prophecy, before leaving DC Comics to pursue a career in writing comics about fish jizz, Dumblemoore cast a protective spell on Vertigo which declared that "no series may be canceled while a mega-crossover event is taking place." Dumblemoore's spell was cast in order to protect Vertigo comics, for Vertigo's esteemed creators "have a power which Didimort knows not" - writing talent - as clearly demonstrated by Didimort's abysmal stints writing Outsiders and Phantom Stranger.
And so, in a last ditch effort to prevent their cancelation and save Vertigo, Fables and The Unwritten will launch into a crossover in May, beginning with The Unwritten #50, and featuring Tom Taylor and Bigby Wolf. The establishment of a shared universe for these characters will no-doubt lead to semi-annual crossover events that forever alter the status quo of the Vertigo universe, until the next crossover event. With a perpetual series of crossovers, Dumblemoore's spell will remain unbroken, and Didimort will be force to endure the continued publishing of comics people actually want to read, which, due to an irreversible corruption of his soul that occurred while creating horcruxes by murdering the careers of toxic characters like Cassandra Cain and Stephanie Brown, Didimort finds completely intolerable.