Apparently the release date of Monster Hunter Generations was leaked in this Amazon Listing and it appears the game may be released on July 31, however, the release date is yet to be announced by Nintendo or Capcom.
Check out the official trailer!
The Monster Hunter series is a very popular franchise in Japan being that Monster Hunter Cross (Generations in Japan) was released last year and sold 3 million copies by the end of December. This game in the series was announced back at the last Nintendo Direct from the previous week, where it showed all the new features that will be introduced in the series.
Includes several titles.
Which was showcased at E3 2003.