Splinter Cell: Blacklist - What am I getting with this? Haven't played a Splinter Cell game though since the original ones for the Gamecube/Xbox...and couldn't finish 'em! I found them boring or too slow for my tastes. I do love MGS though, which is overall my favourite non-Nintendo franchise for sure.
Assassin's Creed 4 - I was bored with the first game, third game never hooked me, second game I did enjoy but unfortunately never finished. Not really a fan of the "modern day" story lines, I tend to enjoy the the historical ones though...and pirates seems like something I might enjoy! But is it too slow paced?
Rayman Legends - I do love platformers. But have never really got into previous Rayman games (though I have tried...2 was supposedly the best but a collect-a-thon...though I know this is a side scroller and I like Mario a lot if that changes anything)
Deus Ex: HR Director's Cut - I'm intrigued by the DC. I never played through the original one beyond the first level. I could get the original version on PS+ but its not the Director's Cut version. Is it a great game? How does it differ from the normal version? Is the Wii U version superior in any way? Any gamepad support? Can you play with Pro controller?
Any help or input from those of you who have these games or played these games would be welcomed.
Or, should I just focus on finishing up Xenoblade and getting through the First Party Nintendo titles?
Splinter Cell is a natural evolution from Conviction. If you have played Conviction, you'll enjoy Blacklist. However, it is not a stealth game. It has elements of stealth, but it is much more about empowerment. It is nothing like the originals, so you're fine. It is faster than MGS (haven't played Ground Zeroes) though, so keep that in mind. On the Wii U, there are long load times, and some textures are atrocious. However, the Wii U Gamepad does offer some nifty inventory management. Online seems to work now, although the population has died. I can only get into a Spies vs. Merc match every now and then. Also, there is no local co-op.
Assassin's Creed 4 has a less emphasis on the modern day storyline, and it's fairly non-intrusive. As for the pacing, it's what you make of it. Do all the sidequests, upgrades, etc.? Yes, it will be slow paced. Follow the storyline and just the storyline? It seems to flow fairly well. If you liked the 2nd one, you'll most likely enjoy Black Flag. Framerate can get pretty bad at points though.
Rayman Legends I'm picking up tomorrow. So I have no idea, other than it offers 5 player co-op.
Deus Ex has a lot of changes to it, primarily the ability to beat bosses with different methods. The Wii U version is a great enhancement, and the Gamepad is utilized for inventory, map (you can draw on it I think), hacking etc. It also has a lot of Developer Commentary. Also, you get the DLC (The Missing Link) I believe, and it's integrated into the main story (if I recall) which is a nice bonus.
EDIT: I just want to say that AC4, Splinter Cell, and Rayman are fairly cheap (I'm assuming you're in Canada). However, I'd honestly place Deus Ex as the superior game to all of them, it's a great game with an engrossing story, and has a large amount of content that matters.