Hah! Adam and Eddie answered my question! Thank you!
Yeah, when you see a question about Imperial Knights, you can bet it was me. Well, not 100%, but where else are you going to find an Imperial Knight fanboy?
Anyway, their answer is: Nope, Cerastus and Acastus chassis will not be in the 11th Edition Imperial Knight codex. Horus Heresy era Knights will not be included in the codex datasheets, but they will not be removed, so most likely they will still be Imperial Armor units like the Custodes' Orion dropship and Ares gunship. Or, at the very least, they will get Legends rules (hopefully it'll be Imperial Armor rather than Legends, so that they can still be used in tournaments).
Would be great if they're part of the whole digital content thing that they promise for codex every quarter (e.g. Legion of the Damned), with lore and stuff to back them up. Not sure what to say, though. Anyway, we'll see!
