I don't think there is going to be much advertising if it does come this year. I'm not even sure who the system is going to appeal to if it releases this year and is only powerful as the Xbone.

I think we can only pray that the NX part of the leak is fake, at least in power or yet again here we all are hoping a new innovation is going to make these things fly off shelves.... *sigh*

Well at least they have to make the system understandable, if it's something which concerns multiple hardwares.
The interest of the gamepad was badly explained, and it was a simple feature.

They need a strong gameline up, because that is by far their biggest strength.
Ads that show Mario and zelda (launch titles) and make clear its a "new" system (dont even mention wii or wii u).

They need to make sure they use the word new every sentence so people understand that it's new.

I think something like this.

Wait, is this real? XDDDDD. I find it really hilarious.

I think it'll be good considering Nintendo is betting everything on the NX. It should just focus on the defining traits of the platform whether it's the rumored NX's multiple form factors/unified library or something else. The only thing I'd ask is for Nintendo to market it to all gamers and not for them to pigeonhole themselves into some children's/casual thing again and only market the console in-between reruns of Spongebob Squarepants.

it is, it was the commercial used for the french launch of the console. Probably in other countries too. It's just perfect

Usually I'm extremely critic about Italian commercials but there was this one Mario Kart Wii ad with the popular comedian Giorgio Panariello where Giorgio was playing MKW with his family, he was in a tie with his son so to win he pushed his son off the sofa and, since the son was playing with the Wii Wheel, his character steered and went off road. the ad terminated with a message similar to "Mario Kart Wii, more careful than Giorgio" where the careful translation meant both in the regards of his son and the preciseness of the controls.
This one very ad was great because:
-it wasn't painful to watch (it lasted 20-30 seconds and even if it repeated at every single commercial break it didn't get annoying );
-It made the spectators laugh;
-It showed off both the game and the console;
-It featured a really popular person;

I think this ad should be taken as an example for the NX marketing campaign, there are already a lot of really popular personalities that are known for beeing Nintendo fans, so why not asking them to work on Nintendo commercials ? Immagine a Ronda Rousey ad for a Punch-out!!/Metroid game or a Paul Pogba ad for FIFA/Pokémon !!

Unless, of course, it's innovation involves connecting to a cloud which gives the NX a 50% performance boost and allows it to spring ahead of the PS4 in terms of power. ;)