Fairfax-owned Marlborough Express recently went down to publishing only three days a week.
Fairfax Media chief executive Greg Hywood believed the Commerce Commission had failed New Zealand.
"In light of the NZCC decision, an even greater focus on cost efficiency will be necessary.
Moving to the next stage of our New Zealand publishing model will involve reshaping how we deliver our journalism to local communities. Further publishing frequency changes and consolidation of titles is an inevitability," Hywood said.
"This decision does nothing to address the challenge of the global search and social giants, which produce no local journalism, employ very few New Zealanders, and pay minimal, if any, local taxes."
Horton Media today indicated interest in Fairfax Media's assets.
"Our potential interest in certain assets has been made abundantly clear to senior managers of both companies in the past," said Horton Media owner Matthew Horton.
"I am also aware of several other parties' interest in other parts of both companies," he said.