I just got it today and after just the first hour of play, color me impressed. This is one of those titles where hype is not a bad thing. After the intro that we have all seen, Wario goes into the first level, serving as a tutorial of sorts. You meet up with Captain Maple Syrup and you start on your journey. The tutorial, which is a pirate ship, plays eerily like the first level of Wario Land 4. The mechanic is similar to 4 in the sense that you have a time limit to get back to the start as fast as you can after capturing one of Queen Melful's citizens from danger. After this first level, a shop opened up where you can buy potions, level up items, and maps to access new levels. There is also a sound test. The game looks absolutely beautiful, and no screenshots do it any justice. Don't hesitate to pick this one when it hits your region.
VIDEOS FOR YOUR VIEWING PLEASURE! These will not spoil the story, but might spoil some of the levels. Look away if you want a complete surprise when you play.
The first video features the first 3 stages!
Video of 2 more awesome stages in world 1!
Video of the last stage in world 1, the first stage in world 2, and the first boss! Don't watch if you don't want the first boss spoiled, he has not been in any official trailers.
Enjoy the rest of world 2, right before the world 2 boss!
Enjoy the boss of world 2, a death race!
Take a ride on the train! 3 levels including the train in this one!
Time to gamble! It is the Shaking Casino!
The AWESOME ENDING! SPOILERS DUH!