Microsoft has inadvertently confirmed both the Lumia 950 and Lumia 950 XL. The company mistakenly published listings for the two upcoming smartphones on its UK store. Pricing and such weren't confirmed, but at least we now know exactly what's planned with regards to branding.
The "2TB SD" spec you'll see just refers to the SDXC standard, before anyone gets too excited. There aren't any 2TB microSD cards out there and if there were, you'd probably have to mortgage your house to buy one. It does however mean you can put one of those Sandisk 200GB cards in just fine.
Unfortunately, the store links for said listings do not work but we do have a small insight into the specifications that will be sported by the unannounced Windows 10 Mobile handsets. We expect the Lumia 950 and Lumia 950 XL to be announced at Microsoft's upcoming event.
Source: Microsoft Store (UK); thanks, Longstone, for the tip!