We'll find out soon since they're supposedly releasing it in a few weeks. My guess would be not since the dropped the aluminum 105 model for 2016.
Here's the bike for anyone who hasn't seen it yet. I'm sure it'll ride great but I can't past the looks of this and the Roubaix. There's merit in making a good looking bike.
Is This the 2018 Specialized Diverge? | Bicycling