I think the best thing Nintendo can do is what they're doing: increase marketing spend, and pump the games out (as they did with the 3DS). Announcing Pokémon Z as a Christmas 2014 Wii U exclusive wouldn't hurt either (announce at E3 for maximum disruption of PS4 and X1 announcements).
However, I think long term they want to be planning on releasing their next console early; probably around 2017, aim for a 5 year cycle, play the specs game with the next console (in 4 years time could easily outpace the PS4, whilst still keeping the price in the Nintendo Zone), and build up a base of customers in the 2/3 years headstart over the competition for Gen 9.
Or just give us Pokémon Z on Wii U...







