I'm surprised that the Wii U got Call of Duty: Ghosts in 2013.
Since the Wii U didn't get AW, I'm pretty sure Activision no longer has any interest in bringing any more COD games to the Wii U.
"Just for comparison Uncharted 4 was 20x bigger than Splatoon 2. This shows the huge difference between Sony's first-party games and Nintendo's first-party games."