celador on 18 November 2016
Seems like a an easy decision for Nintendo. Wii U was such a failure that, even though games like MK and Splatoon sold well, many people who may have been interested couldn't justify the purchase of the console with such little else to offer. These ports all seem to be coming early anyway, it's not as if year 2 or 3 of Switch will be similar.
There will be at least one more Switch exclusive announced for the first year, in addition to Mario, Pikmin 4 and Mario-Rabbids I would guess
