The new Nikkor 120-300mm f/2.8E FL ED SR VR lens was supposed to start shipping on February 29. I was told that this lens is also delayed (together with the 70-200mm and 20mm Z lenses). This information is not official (yet). Amazon now lists the shipping date for the lens as March 31:
Nikon has digital camera-related production plants in Japan, Laos, Thailand, and China.
Nikkor 120-300mm f/2.8E FL ED SR VR pre-order links: Adorama | B&H | Amazon | WEX | Park Camera | Calumet | Camera Canada