Beastmen are possibly getting dropped from W:AoS and shifted to The Old World.
I
strongly doubt this rumour, at least in this form. Beastmen are a fairly popular army, albeit one not particularly well supported. I really struggled seeing them flat out drop a faction from their main game, to add it to the niche specialist game.
The rumour I've heard is simply that beasty boys are the next army coming after dwarves, and the local stores have said thats caused an uptick in selling what AoS beastment there are.
I'm also somewhat cautious about chatter about "revisiting the game". Its been
two months, and they've only released one army past the initial release, and a handful of stuff for that initial release. We know dwarfs are coming, but we haven't even got four full factions out yet. I don't see the developers revisiting ANYTHING until they get at least half way and see how the money flows and interests stays.