Thanks to Wizards president, Robb Heineman, we now have a date for when the new stadium renderings will be out for the stadium at Bannister. He expects the renderings to be ready by Jan 31st at the latest, and says there is a good chance they'll beat that date.
It looks like there will possibly be a Cauldron/season ticket holder sneak preview of the renderings coming before the renderings are released publicly. Down the Byline will be there and will hopefully have picture to bring you of the new renderings.
For reference, this is the rendering that was brought out last November when the location of the stadium was going to be around 69 highway and 159th St.
And this is the current place holder design for the stadium, which will not be what the final renderings will look like.