The Warhammer TV podcast Stormcast had some interesting things show up on the second episode. So here are some of the points that are important.
via a reader here on Faeit 212
Watching the second episode I found the following hints:
-There will be 13 endless spells and will come in one box (4:20 Mark)
-Prismatic palisade endless spell creates a wall that you can't shoot through (12:53 Mark)
-Endless spells will have a point cost (13:24 Mark)
-There will be a big rulebook with maps and rules for the realms, maybe the new General's Handbook? (7:07 Mark)