Hi dear Sha,
For the enhanced further eMTC (eFeMTC) defined in release 15, the related roadmap is shown as follows. While for the 5G feature such as mMTC, the planning will be updated in roadmap in the future based on standard progress (3GPP Rel16 has not been frozen) as well as the customer requirements.

Note: The information in roadmap is for reference purpose only, and is subject to change or withdrawal according to specific customer requirements and conditions.
For the hybrid deployment scenario at 3MHz, it is recommended to use 1.4MHz LTE+1.4MHz eMTC, so that it can simultaneously support both 3GPP MCPTT voice and IoT M2M services.
Hope this can help you!