According to the Verge, the 1020 will pack a 41-megapixel camera with PureView branding, a 4.5-inch AMOLED display, 2GB of RAM, and 32GB of storage—which is in agreement with this morning's leak. The Verge also believes that Nokia will supply a wide-angle lens on the front-facing camera, which will also include a Xenon flash and F/2.2 lens.
There will also be a new Pro Camera app—speculatively pictured below courtesy of Vizileaks— which will offer image stabilization, along with adjustable white balance, ISO, focus, shutter speed, and more. The software will also, so Verge claims, be weighty when it comes to processing, with variable aspect ratios and the ability to capture multiple image resolutions simultaneously.
Finally, there will, apparently, be a camera grip shell available, with tripod-mount support, two-stage camera button, USB and battery. It seems likely this is all accurate—but we'll know for sure in a few hours time when Nokia's event kicks off. [Verge]
Update: There's also a trio videos that briefly surfaced on AT&T's official YouTube channel ahead of the launch (someone's likely to get the sack...). The videos show off the phone's video capabilities, including 720p with 6x zoom and stereo audio capture, the 41-megapixel sensor, optical image stabilization, Zeiss optics and full manual control. The rest? We'll learn soon enough.