Amazon took it off their site maybe because their preorder quota got maxed out. For collectors this is a must have but if you are just a regular player then you might want to look at what it will contain before spending $40 or more on it.
Yeah that was my mistake too. I should have just preordered. LOL Now I have to wait and see (If it pops up on my area). If it comes out during the heat of the upcoming set (if it comes out on august) then it might be hard to get a hold off.
If your local stores have a poor record when it comes to restocking their bakugan then I suggest pre-ordering them. If in any case they did show up at your local stores before the October release date then you can still cancel your order at Amazon. Think of pre-prdering it as more of a guarantee that you will get a hold of one. The release will probably be at the heat of the new set so this item might be flying off the shelves once they start showing up.