As DC Comics parcels out its April solicitations ahead of their full release at 2 p.m., we learn that I, Vampire and DC Universe Presents will be canceled with Issue 19, and Saucer Country with Issue 14. Update: The all-ages Superman Family Adventures also will end with Issue 12.

Launched in September 2011 as part of the New 52's "Dark Group," I, Vampire teamed writer Joshua Hale Fialkov and artist Andrea Sorrentino for a revival of the horror-romance serial that appeared from 1980 to 1983 in the House of Mystery anthology. Although the new series was a solid performer out of the gate, with the debut issue selling nearly 36,000, by the 14th issue that figure had slid below the 14,000 mark.

"Yep. I, Vampire is done as of 19. It's been an amazing ride," Fialkov wrote this afternoon on Twitter. "Thanks to all of my collaborators and stay tuned for the kickass conclusion. I've known For almost four months and got to write the ending I wanted. No complaints."

Another of the New 52 launch titles, DC Universe Presents debuted with a Deadman storyline before embracing such diverse characters as the Challengers of the Unknown, Vandal Savage, Kid Flash, Blue Devil and Blue Beetle. Like I, Vampire, the anthology started solidly enough, with more than 41,000 copies but -- again, like I, Vampire -- it had plummeted below 14,000 by Issue 14.

Announced by Vertigo at the 2011 New York Comic Con, Saucer Country is the creator-owned series by Paul Cornell and Ryan Kelly that follows New Mexico Gov. Arcadia Alvarado who, on the eve of announcing her candidacy for president, is abducted by aliens. It debuted in March 2012 to nearly 16,000 copies, but by November's Issue had been more than cut in half. While it's difficult to judge the performance of Vertigo titles, as they tend to perform better in the book market, that number was clearly far too low to continue the series.

On his blog, Cornell states that he's "heartbroken" Saucer Country is ending and knows fans will be disappointed that book's mysteries weren't all answered. "So I make this promise to you: I will, one day, finish Saucer Country, in one way or another, in a dramatically satisfying way," he wrote. "That is to say, I won't just put up the remainder of the plot on my blog or something, I'll find a professional means to actually complete the story, ideally in comic book form, or as a novel or, hey, go on, a movie. The rights revert to me reasonably soon. We'll work from there. "