You can see the features of the next version of Hyper-V (and related parts of Windows Server) here.
I just checked and you can find:
- Windows Server (Standard) Technical Preview
- Windows Server Datacenter Technical Preview
- Hyper-V Server Technical Preview
The Windows 10 technical previews are also there.
An image is available in the Azure gallery for the Windows Server Technical Preview. I deployed it in Europe North and it works fine.
You can also get the Remote Server Administration Tools for Windows 10 Technical Preview.
The System Center preview (minus SCCM) is also available to download from MSDN. Note that App Controller no longer exists, and Windows Azure Pack should be used instead.