According to Brian K. Vaughn, [YLMAN] is running out of time:
"It's my understanding that the rights to 'Y: The Last Man' will revert back to co-creator Pia Guerra and me for the first time in a decade if the planned New Line adaptation doesn't start shooting in the next few months... So I expect there will be some 'Y' news in 2014 either way."
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http://badassdigest.com/2014/01/22/let-us-pray-for-the-collapse-of-the-y-the-last-man-movie