Hmm...interesting. I like how it's embellished with tidbits of info we could guess ourselves: The senate will have a darker look (the whole movie has been described as darker in tone), Palpy will be pretty much in control (safe guess since he's the Supreme Chancellor), and the actors playing senators have the majority of their scenes in the Senate (big surprise). Actually, nothing really there that's all that surprising; we could have guessed as much long ago. I find that most rumours are false if you can say, "I thought so!". I'm betting the true rumours are the ones we never saw coming. If there's a rumour circulating that's really out of left field, like a scene where Obi-Wan fights a pterodactyl-like creature, I'd bet it's true.
Don't mean to dump on AICN, but it seems their "rumours" are more like fan speculation.