FCC approved the two phones and listing them online, it would probably be the new Nexus devices.
The listing also includes the approved frequency bands and notes that the phones come with Wi-FI 802.11 a/b/g/n/ac, Bluetooth LE, and NFC.
Here’s the label:
I wish there were more specs included, like a photo with processor details, but alas, we’ve got nothing official. We’ve heard the phones might only differ by their screen sizes; Sailfish might have a 5-inch screen with 1080p display while Marlin could have a 5.5-inch QHD AMOLED one. For now, let the summer rumors keep you going until we get real confirmation.