You can scratch off Hexblade from that list. Larian has already stated that we will only see things from the PHB when it comes to the classes. So for Warlocks it's going to be Archfey, Fiend, and GoO Warlocks.
I would like to see source of that information ...
Since as far as i know Larian, or to be more precise Swen, litteraly told us that their aim is to implement all classes, sub-classes and races from PHB ... WHILE they are looking to other books as additional source of inspiration, and ideas.
They never said that nothing outside PHB will be implemented.
And if they did, i would like to see the source, since im not aware of that and i believe im wathing them quite thoroughly.
