"That is not a real prospect, because the cost of losing readers' attention is too great."
Goodard said the commission made "a number of significant errors" in declining the merger.
These included a reduction in quality of the news a merged company would create and the narrow approach the commission took to the issue of lessening of competition in the media market, he said.
"The commission's approach was speculative that plurality is detrimental but it is unsupported by evidence."
Goddard said the potential benefits from the merger could be up to $200 million a year, which would benefit New Zealand.
Opening remarks are expected to take all of Monday, with James Farmer, QC, representing the commission.
Both lawyers have already agreed with Justice Robert Dobson that some of the hearing will be held in confidential sessions, due to the nature of some of the evidence.
NZME and Fairfax have five lawyers set up to argue the case, the same number as the Commerce Commission.
The hearing is set down for two weeks.