Take this one with a pound of salt, but ComicBookMovie reports that Robin may well be introduced in the final installment of director Christopher Nolan’s Bat-trilogy.

A tipster, without official confirmation, tells the site that actor Joseph Gordon Levitt, who will portray Gotham cop John Blake in the flick, takes up the Robin mantle. There’s no word on whether the actual red jerkin and green tights will be involved. Knowing Nolan’s penchant for darkness, that seems unlikely. But you can never tell about these things.

Anyway, here’s the word from the anonymous tipster, who was in Pittsburgh for recent filming:

“Hi all. PLEASE take this as rumor. I’m simply going to relay the story as it was told to me.

So I started a new job in downtown Pittsburgh on Monday near Smithfield St. For those that know Pittsburgh, they filmed here and on Cherry Way, which I have a view of from my office window. At the corner of Smithfield & the Blvd of the Allies, there is a small comic shop.

I went in for the first time yesterday and started talking to the guy who runs it, and he was telling me about some of the crew who came into the shop. This is what he told me:

He said that a weapons prop crew member was in the shop talking about the filming, and said that ROBIN WAS BEING INTRODUCED IN THIS FILM.

I repeat, he said that ROBIN WAS BEING INTRODUCED IN THIS FILM.

I asked him who he said would be playing him, and he said, “The dark-haired guy from 3rd Rock From the Sun.”

That, of course, is Joseph Gordon-Levitt.

I pressed him for more details and he said that Bruce Wayne will “retire” as Batman, and that JGL will take up his cause as Robin. He did not say if this was mid-film (meaning Batman would return, making sense so far from what we know) or if this is how the film would end.

Now, this comic shop manager didn’t seem to know much about the filming…he didn’t even know who JGL was. I asked him if Robin would be in full costume, and he said that he would be in full costume “in the next film”. We know that Nolan doing another Bat-film is pretty much not going to happen. So PLEASE take this with a grain of salt, as he could’ve easily been confused or mislead (perhaps intentionally). Don’t shoot the messenger.”

Speculation has been flying fast and furious about the movie. I’ll believe it if, and when, I see it.