James Gunn is OUT After Supergirl DISASTER?!

A rumor claims that James Gunn is absolutely OUT at DC as soon as his contract expires, and that Warner Bros. will try to make it look like it was Gunn's decision to "move on to other things. But no, he's totally fired. Is the rumor legit? Well, it comes from the same source that was dead on that Hal Jordan bites it in the first episode of Lanterns, sooo...?