[redoing thread because previous attempt vanished, also some edits]
According to a well-informed FLGS owner friend of mine, GW are having "training" sessions about the release coming weekend. It's supposed to be fully revealed (with date, etc) in a WarCom article on Sunday July 12th, which marks 27th-28th as the likely release date with a 2-week preorder period. This is first hand knowledge.
His second-hand information also indicates that supposedly the price of the box equals the price of Necromunda: Uprising, unfortunately. Sad beep.
Warhammer Community post with pre-order date here (hint: 11 July).
Edited by Brother Tyler, 01 July 2020 - 02:31 PM.
Added pre-order date information/link.