Dînadan:
GW are releasing an army book for Lizardmen - sorry, Serraphon - for AoS:
http://www.beastsofwar.com/age-of-sigmar/lizardmen-return-age-sigmar-seraphon-battletome/
Admiral:
Nice artwork, though I wonder if they’ll receive new miniatures and if so, what direction GW will take.
Dînadan:
Arm looks like they’re just giving them round bases. Maybe they should stick a sprue of guns into the box and make them dual purpose by reintroducing Slaan to 40k 
Thommy H:
It’s just a repack and refluff, like the Sylvaneth (Forest Spirits). Actually it looks like the continuity between the Warhammer and AoS versions will be quite cool - the Slann escaped into space and have been wandering the stars ever since, and now they’ve come to the Mortal Realms even wiser and more powerful and are literally conjuring their servants from their memories! Explains all that summoning stuff in the Lizardmen warscrolls anyway.