The big, bad and deadly helicopter is on the works but I would not hold my breath, guys. Belsimtek (the authors of the Huey and Mi-8 for DCS) has a lot on their hands. Here's their post (which you can find here):
After release of Tiger and Magnificent Eight at the end of 2016 almost all our effort was relayed to development of F/A-18 DCS module in cooperation with Eagle Dynamics. In this project we are handling dynamics, avionics and systems, FCS (Flight Control System) included.
In parallel we continue our work on exciting project for fans of combat helicopters - the attack helicopter Mi-24P (was a long time since we pleased our helicopter enthusiasts, and ourselves as developers, by a war machine with rotor dynamics).
Also we started development of the famous fighter-bomber F-4E.
We are planning to post updates about each project in future.
Wish you to have a great time learning available DCS World modules and hope you will like quality of the upcoming ones.