Under the plan, the multiplatform news operations and output will close, meaning all news production - including the Newshub website - will stop from 30 June.
The proposed new model includes a transition to a "digitally led business".
ThreeNow - the brand's online streaming service - would be at the core of that model, supported by free-to-air linear channels, the company said.
Media commentator Duncan Greive founder of The Spinoff, told Midday Report: "What we're going to see, as I understand it, is that Three will be a brand in New Zealand in name only."
While the company has not come out with a specific list of programmes to be cut, commentators say the statement from the global conglomerate suggests it would include the likes of:
It is proposed ThreeNow and Three's shows would feature local programming in conjunction with funding partners, including drama, comedy, sport, reality and factual, and "key titles" from Warner Bros. Discovery's library.
Bravo, Eden, Rush and HGTV would continue in their current form with the same content slate.
New local programming would only be in collaboration with local funding bodies and other partners.
"I'm guessing that involves things like documentaries by Patrick Gower, and occasional other documentaries under the Newshub brand," Mediawatch's Colin Peacock said.
The consultation process runs until mid-March.
A final decision is expected early April after feedback has been considered.
All other Warner Bros. Discovery ANZ operations are not part of this consultation, including Theatrical Production and Distribution, Content Licensing, Affiliate Partnerships for Pay TV Channels, and independent local production business, WBITVP NZ.