It is very challenging for Blizzard to port Overwatch to Nintendo Switch. In a recent interview, Overwatch Director Jeff Kaplan talked about the issues development team will face in bringing Overwatch to Nintendo Switch.
A teardown report states that it cost Nintendo $257 (each units) to manufacture Nintendo Switch. This means Nintendo is selling Nintendo Switch on profit as the retail price of Nintendo Switch is $299.
Nintendo America Boss Reggie Fils-Aime has confirmed that Nintendo Switch is outperforming Wii, 3DS, DS launch sales in the United States. The response to the Nintendo Switch is so good that it is setting new sales record every day.