Please remember that these are rumors and should be taken with a grain of salt.
via Bigred over on Bols
First up, we have the previous rumors talking about "Lore Equivalents" and the general pattern forming of a lot of WFB 8th concepts making their way into the game. Here's the latest from the Bothans:
-There will be at least 4+ "Disciplines" of Psychic Powers in the game. (WFB has 8 lores)
-Disciplines seem to fall roughly along the lines of the sects described in the novel "A Thousand Sons" as used by the Heresy-Era chapter.
-Each Discipline will have a "Default" power and a set of others that you will roll for each game.
-Number of rolls you get and the the exact details of which powers you end up with are said to be similar to WFB 8th's power selection mechanic.
-Powers have a "Casting Cost" that is different from the mechanic used in WFB 8th.
-Certain 6th Codices will add additional racial specific Disciplines.