nintendo wont drop the price.
they will bundle amiibos and games with wii u, but will keep 299.
XBO will go to 349
ps4, i really dont know. it will still sell better than this year with 400$ price tag.
every home console will sell better than 2015 than 2014. 2015 will be the peak for wii U, but not for XBO and PS4.
i think those are safe bets.