Sorry for having a lazy answer but you can check on their website if they have any or not

only splatoon thats up, the COD games are never coming back sadly tho according to the pretendo site

fortnite

The only one I can think of is Splatoon. Call of Duty's online services are so dissimilar to most every other Wii U game that Pretendo has already made it clear that they won't ever support them. As for the person who said Fortnite... you're an idiot. Fortnite isn't on Wii U.

Aw thats a shame, i know it isnt a massive genre on Nintendo consoles typically but i dont sometimes like to shoot things and i used to enjoy COD Ghosts! Thanks for answering