What's interesting about the LG-D820 approval is that it includes almost all of the bands you'd want for a North American SKU that covers LTE, CDMA, and HSPA+ for AT&T, T-Mobile, and Sprint. There's no Verizon LTE (Band 13) in this band coverage. Non inclusion of Verizon LTE banding in an upcoming Nexus isn't much of a surprise after relationship issues following Galaxy Nexus (CDMA/LTE), inclusion of Sprint is a bit of one, but not as much (Google Voice, Google Wallet).
The breakdown is LTE on bands: 2, 4, 5, 17, 25, 26, 41 (1 and 7 are probable as well, FCC only lists what's relevant inside the USA), WCDMA on bands: 2, 4, 5, and CDMA2000 1x/EVDO on band classes 0, 1, and 10 (800, 1900, 900 MHz). There's also 802.11a/b/g/n/ac (the screenshot above doesn't call out 802.11ac but it is explicitly mentioned and tested in the appropriate sections of the test reports) as well as BT 4.0 LE (Bluetooth smart ready). Inclusion of CDMA2000 1x/EVDO in and of itself is surprising, and the device includes the necessary LTE banding for Sprint, of course CDMA2000 is also relevant in a few other markets in combination with LTE.
Update: Another thing that caught my eye was inclusion of mention that the LG-D820 uses variable antenna matching (antenna tuning) which would be necessary if it's going to accommodate a lot of different bands on just one transmit antenna. This could end up being a Qualcomm tunable frontend part. Display diagonal is also listed as 126.0mm which works out to 4.96-inches diagonal for display, enough to warrant a Nexus 5 name, and a length and width of 131.9 mm x 68.2 mm.
Update: Brad Molen from Engadget caught a reference to MSM8974, aosp_hammerhead and KyeLimePie[sic] inside the disclosure as well. There are two references to MSM8974 (Snapdragon 800) which would to validate that as being the SoC platform and this as a Nexus device running 4.4 which was codenamed Key Lime Pie up until its recent rebranding to KitKat.
