They should buy ubisoft.
Of course when the wii was big was the time to buy new studios. They could have supported the wii properly throughout it's life and made a lot of money in the process due to it's install base. Then they'd have been prepared to supply all the games they needed for the wii u to do well regardless of third parties.
To be far they have expanded a lot. I don't think it's as much of a west vs east issue as some make out. They just need a steady supply of appealing games that sell well to the nintendo audience and attract new people to the system. They can't compete with an xbox when it comes to shoot em ups and shouldn't waste a ton of money trying, but if nintendo gamers have a casual interest in the odd shooter they can still play 2 cod games and a splinter cell on the wii u, along with range of other games... and a lot of platformers.







