While we know for sure that Droid RAZR will be here this Friday at 11:11 am and the HTC Rezound is coming on 11/14, it's not clear yet when the Samsung Galaxy Nexus will be launched. There are a few cases for it coming soon with great battery life.
There are reports that a holster shell case and silicone cover case have been seen at Verizon retail stores suggesting that the Samsung Galaxy Nexus will be released soon. There are also compatible cases available from Amazon.com and other online wireless accessory stores. Those who watch case releases report that cases can arrive in stores about two weeks before the release date.
An anonymous screenshot from the Samsung Galaxy Nexus shows 45% of battery life left, reportedly after 5 hours of heavy use and the brightness set to maximum.