A court hearing is scheduled for April after Stephen last year filed a lawsuit in what is reported to be $4.5 million fight over trust assets.
In October, The Spinoff reported a Gisborne boutique winery Nick established called Vinoptima Estate went into receivership as relations between the brothers frayed.
Vinoptima has debts of around $15 million, the receiver's first report shows, far short of assets which are listed with a cost value of $9.2m, potentially meaning it will be unable to repay creditors and shareholders.
Stephen Nobilo confirmed to the Herald he is pursuing legal action against his brother but preferred not to comment further on the case.
He said FE Investments called in a mortgage on the Waimarie property on Muriwai Valley Rd and wasn't able to extend any additional time to arrange further finance.
"Fortunately for us we were able to sort it out at the eleventh hour and as soon as FE has been advised by our lawyer, it's my understanding the property will be off the market.
"We always knew we'd get in this situation but that's just business."
Marketing material describes the estate as a unique lifestyle and investment property set in the Muriwai Valley with stunning rural views and surrounded by native bush.
A modern, purpose-developed equestrian complex comes with a full-sized and floodlit Olympic dressage arena, stables, farm buildings along with a 1960s three-bedroom, weatherboard character bungalow.
The Nobilo family were largely responsible for breaking the New Zealand wine industry away from hybrid grape varieties and fortified wines, moving towards classic varietals.
Nick Nobilo snr began growing wine grapes in Huapai in 1943 and was known to pour the concrete for his cellar and make his own wine casks. He died in 2009.
In 1998 Nobilo Wines bought Selaks with brands that included Premium Selection and Founders Reserve. The group is now owned by global company Constellation Wines.