From a post I made elsewhere:
1. A major Wii U update.
including large update to the online experience. and a fully fledged account system. They brought miiverse to 3ds eventually, so think it's a step in that direction. and have accounts, friendslist, miiverse and eshop more closely linked. I am aware that something that huge takes time to be truly functional.
Also Tvii for Europe and the quick boot function.
2. Nintendo will add huge selection of VC games and new ideas to eShop
Pretty straight forward...inclusive of Gamecube games, 64 games and DS games.
But with more things like the nes remix, where people can interact with others and be part of something. Also will have huge sales...a subscription service is something people throw around alot, but don't think it can happen at this time. The suggestion here is something that doesn't require alot of effort.
Although with pokémon bank, subscription based services are not far off. Maybe 2015/16
3. large remarketing campaign.
not excactly an announcement but will come after E3, particularly aimed towards western audiences. And will showcase...number 4:
4. New games!
I think it's safe to say that if the Wii U was released with 2014s line up in addition, it would be more appealing.
Thats just the games we know of. There will be new announcements soon, Hyrule Warriors came out of nowhere, same with 3D world; expect similar suprises.
Also expect more 3rd party exclusives via the funding of new games by nintendo. Platinum games and Sega being prime examples...Also hurry up nintendo and fund Shadow of the Eternals
These are mainly suggestions that can be played out from behing the office walls without changing anything drastically and will improve the system and experience on the console. straight forward easy improvements.