"DL is the dominant airline in NYC based on total local passengers" and AA doesn't account for income taxes. The delusion and detachment from reality remain strong.
Back here in reality, I suppose that for the above (the former, not the laughably, categorically-false latter) to be taken seriously, we will be asked to suspend reality and pretend, as Delta's marketing seems to do, that "New York City" proper and EWR are not one common air market, therefore allowing for the typical comedy about Delta "dominating" anything in the NYC air market - O&D or otherwise.
But on the larger point, it's notable and ironic that we must be treated - yet again - to the diatribes and recitations about all the "strategic moves" Delta has been required to make in the last few years. It's ironic for several reasons. First, because when AA makes similar "strategic moves" into important growth markets where it needs to build a presence, even if its initially margin-dilutive, we have to listen to the usual hysterics implying that AA's managers don't know what they're doing (and a self-appointed expert who already got kicked off of one industry forum) knows better, and that AA's employees should be picketing if not burning down headquarters because "their" hard-earned dollars are paying for Doug Parker's stupid "bets." And secondly, it's absolutely stunning that we have to hear all about the brilliant strategic moves Delta has made in the last decade, delivered without even the slightest hint of irony given that the laundry list essentially proves the point - Delta has been making lots of moves, specifically into AA's and United's markets, because Delta had to given its historically lower-revenue-generating network.
So as said repeatedly - congratulations to Delta for smartly taking advantage of the temporary, transitory weakness of their chief rivals to consolidate some gains from their merger and grow their network when they had the chance. But now they clearly have several major competitors who are more than capable of pushing back - as multiple recent moves show.
And back to the actual point of this thread - given Brazil's macroeconomic conditions, the prevailing yields in these markets, and the ever-intensifying competition on these routes, once again good luck to Delta fighting for MCO-Brazil traffic.