expression, noun which may take the genitive case particle 'no'
coming soon; on sale soon
Used in commercial contexts to announce that a product will be released or available for purchase in the near future. Often seen in advertisements, product pages, and promotional materials.
This game is scheduled to be released soon.
Please check out the new products coming soon.
発売中 means 'now on sale', indicating the product is already available, whereas 近日発売 means it will be available soon.
近日公開 is used for movies or events that will be 'opening soon', while 近日発売 is specifically for products going on sale.
Compound of 近日 (soon, in a few days) and 発売 (release for sale). A straightforward commercial phrase.