Sometimes in the rush for news stories, some are wild speculation and rumor, only to mutate down the road as fact when it isn’t. Case in point- Robert Rodriguez and the Deadpool project.
The Machete director gave a quick interview to MTV about the matter:

“I was working with Fox already on ‘Predators’ and I asked what other movies they had coming up,” he explained. “It was ‘Planet of the Apes’ and other stuff. They said I might want to see ‘Deadpool.’ So I said, ‘Sure, send it to me.’ Almost just out of curiosity. And if I really, really wanted to do it, maybe I could figure out a way to do it. But that wasn’t really going to happen. I just couldn’t fit it in with other projects.”
“People send you scripts all the time to read,” he added. “They’ll send the same script out to 20 different directors, but for some reason they write about it when I’m reading something. I’m like, ‘Well, I was just reading it!’ “

Rodriguez said his involvement with the project never progressed beyond reading the script and that he certainly did not enter into any sort of negotiation to direct the film.

Things like this have been known to happen. Rodriguez further goes on to say that when it comes to pre-existing proprties and directing, he tends to lean towards his own work, with the only exception being Sin City.

FX wiz Tim Miller eventually took the Deadpool directing job. If and when the film comes to pass is another ballgame.