It looks like the DM role is going through a bit of an evolution at the moment anyway, with most teams now adopting a high-press. Most of that aggressive chasing and breaking up of play is now done early and high up the pitch by the attacking players (which includes any B2B midfielder or fullback who has pushed forward), and the role of the deepest midfielder is increasingly becoming more about countering those high-pressing attackers. The hunters are becoming become the hunted, and I think a lot of the more forward-thinking clubs are now looking for the kind of skill set that we used to look for in attacking midfielders for in their DMs - players with exceptional spatial awareness, who are comfortable taking the ball under pressure, have tight control and can go past a man with ease, can thread a pass and break the opposition lines, and who can help catch the opposition with their pants down, with too many players over-committed too far forward.
Basically, guys like Cazorla.
That's what I think we might see, anyway: a GK who's good with his feet, a couple of ball-playing CBs in front of him, and a Cazorla-like midfielder sat in front of them; Then you have a couple of end-to-end fullbacks and 1 / 2 high-energy B2B midfielders (depending on your formation) as the engine, who can overload either the defence or the attack as needed; and finally 3 / 4 hard-working attackers who chase everything down from the front.