June 6 to June 20 are definitely the dates.
I have no idea who is hosting it – or if the process to find a host has even started. I believe it might be the latter and that NZ would be interested, at least until they see what it involves.
It is set to be two groups of four, semifinals, final, with a four-team pre-tournament finding the eighth team to join the region's 'superior seven'.
The only link to World Cup qualifying as I understand it might be in terms of seeding, but then again they might just use Fifa rankings. WCQ is set to start in September, potentially with all 11 OFC teams entering at the same stage. It will then conclude in either June, September, or October 2021.
As far as the makeup of the All Whites team, it will definitely not be full-strength, and will have a heavy under-23 contingent. How heavy is something I imagine is being discussed at NZF at present.
Plenty to juggle, especially when you consider this tournament will have mandatory release from clubs and the Olympics will not.