Wu-Tang Saga is described as a documentary about the Wutang Clan including all members and concert footage. LAHHE got hands on a copy and it's not so much about the WuTang Clan since it's "Starring" Cappadonna (Consider All Poor People Acceptable, Don't Oppress Nor Neglect Anyone).
As you view the promo, notice other members get "Also starring" credits, which should give you an indication of their involvement. It's only after about 20 minutes into it that you start to notice that no one else has had their black and white time in the chair against the white wall with the director and this is surely a Cappadonna affair (not that there's anything wrong with that, but know what you are buying).
As far as cameos, for example, Slick Rick's appearance in the preview below is about the long and short of it, but I'll give it to him for the muscles.
Whether Cappa is your favorite member or not pick up a copy to hear what Cappadonna says about recording "Ice Cream," being the black sheep of the Wutang, President Obama, threatening Usher at a restaurant for a photo (he's REALLY into photos), and his favorite body of work among other things.