I said it once, and I'll say it again.
The odds of that anime are SLIM and NONE. Slim has a habit of being on vacation alot, so its NONE. (Jokes aside)
Just cause some hacks said there might be, it does not mean there will be. If there was, there would've been more 'credible' sources saying stuff about it now.
Besides, considering that Robert guy already sang his swan song, he's not going to go any further in Hollywood with the typecast of Twilight on his resume- I wouldn't believe him. The guy hates the role he played, and he admitted it, which is why he's not going anywhere, he sorely failed to prove any sort of acting skill he might have had on that first crucial outing.
There's a difference between me and you... I make this look good!