It's looking like with the dark elves they're trying to make each kit a 2 use kit, and they did it with the shadow warriors/maidens for the high elves. I think a lot of the kits are going to get the multiuse treatment by gw so that they won't have to produce as many kits and lose money as a lot of people are saying fantasy is hemorrhaging money. It would be something cool to see with 40k too, but I think it really is just that fantasy isn't making as much money, so they'll make less kits for more units (which I'm all for.)
For the dark elves it seems like the excecutioners, spearmen, wyches, and cavalry are all getting multiuse boxes in case you were wondering.