I wouldnt say Assassin's Creed 4 is showing good legs at all on Wii U when comparing to other versions of the game in 2014.
PS3 - 227k
360 - 183k
XBO - 96k
PS4 - 200k
Hell, Assassin's Creed 3 on PS3 and 360 have both outsold AC4 on Wii U in 2014.
As for the others, meh.
TW101 is arguable, considering how niche the title actually is. It will have good word of mouth helping it out.
Rayman on Wii U is having better legs than on PS3 and 360. That said though, the game hasnt sold very well at all.
_________________________________
Some more Wii U games in 2014:
Wii Party U - 117k
Wind Waker HD - 59k
Pikmin 3 - 37k
LEGO City Undercover - 28k
Disney Infinity - 20k
Just Dance 2014 - 19k
Skylanders Swap Force - 15k
Wii Fit U - 103k
Sonic Lost World - 15k
Dragon Quest X - 4k
Batman: Arkham Origins - 10k
Splinter Cell Blacklist - 3k
NFS: Most Wanted - 7k
Injustice - 3k
Deus Ex Human Revolution - 4k
Sniper Elite V2 - 610 units
Decide for yourself what is good and what is bad.
Edit - And as an addition, when there arent a lot of releases for a platform, the userbase will tend to go back and buy the "lesser priority" games in the library. I think a lot of Wii U games will benefit from this, just as a lot of early PS3 games did in Gen 7. The problem here is that by the time these titles start to leg, theyre already at bargain bin prices.
