Fabius Bile appears courtesy of a the next chapter in the Psychic Awakening series, War of the Spider, which comes in Nip and Tuck Collector's Edition or What A Lovely Specimen Standard Edition. The new book also gives you new rules for Custodes and Death Guard amongst others! Fabius Bile could mean all sorts of things - Chaos Primaris Marines/ the return of Fulgrim/ the Return of Slaanesh/ new beasties for Chaos... it's really never ending, but lets hope we see them soon!
Another blast from the past is contained in the next expansion of Warhammer Quest: Blackstone Fortress – Deadly Alliance. There have been many Xenos through the annals of decades of 40K, but the Zoat has always held a special place in a lot of Beardy's lives. With GW now making him Unaligned, you can add a Zoat to your Tau, Chaos, Tyranids or even Imperial. The hobby potential is almost unlimited!
With Fabius Bile back, he needs a novel to catch us up on his ways, so if you have the stomach for it, then Fabius Bile: Manflayer could very well be for you!
Well, I don't know about you, but I need a Zoat!