Microsoft confirmed SharePoint 2016 on premise on this blog.
Hybrid and on-premises
We know that the move to cloud doesn’t happen all at once. While we’ve seen growing demand for SharePoint Online, we recognize that our customers have a range of requirements that make maintaining existing SharePoint Server deployments the right decision for some. We remain committed to meeting those needs. We’re excited about the next on-premises version of SharePoint and we’re sure you will be too. It has been designed, developed and tested with the Microsoft Software as a Service (SaaS) strategy at its core, drawing from SharePoint Online. With this, SharePoint Server 2016 will offer customers enhanced, flexible deployment options, improved reliability and new IT agility, enabled for massive scale.
We’re also investing deeply in hybrid to allow customers to take advantage of cloud capabilities at their own pace. A hybrid SharePoint deployment can provide IT agility by creating a consistent platform spanning datacenters and cloud, simplifying IT and delivering apps and data to users on any device, anywhere. With SharePoint Server 2016, in addition to delivering rich on-premises capabilities, we’re focused on robust hybrid enablement in order to bring more of the Office 365 experiences to our on-premises customers.
Read more at: http://blogs.office.com/2015/02/02/evolution-sharepoint/