I think GW would be smart to publish a new chaos dwarf army book with all the old units and some new units , if they don't then others will.
I think it looks like GW is just going to do what they did in the Realms of Chaos books , and just have chaos dwarfs as special units like the hellcannon in a general chaos army book for a while. Then after they have made some sales off these new minis, they will release an all new chaos dwarf mini line with their own look and army book.
I don't think GW developers or the fan base is satisfied with chaos dwarfs being auxiliaries in a chaos army I think they want an army with its own separate back ground and history like the last chaos dwarfs.
More and more chaos dwarf fans are creating their own army rules or adopting someone elses , more and more fantasy mini makers are producing chaos dwarf mins for warhammer armies.
If GW doesnt produce a new line of chaos dwarf minis and army rules soon their problem wont be if players will want to buy and play them it will be that players already have.