@evleaks is having a field day today, leaking quite a bunch of devices, at least in specs and codenames. The first of them is the SM-P900, a 12.2 inch tablet that seems to be part of the Galaxy Note series, since it bundles a stylus.
The leakster claims that this model will have a 247 ppi density and rely on an Exynos 5 Octa processor, the famous 8 core chipset that everyone has been talking about for months. The other device leaked by the same source is the P-600, a 10 inch tablet with a Snapdragon 800 CPU and a 299 DPI. You should know that both models leaked here sport the 2560 x 1600 pixel resolution.
These slates were actually spotted weeks ago as codenames in the UAProof, with a bunch of details included. One of them could be the new Nexus 10, that was hinted at by Sundar Pichai the other day. If I can speculate, I’d say that the SM-P900 will end up as Galaxy Note 12 and the P600 could be Nexus 10 II.