One Piece X Bleach/Fairy Tail/Naruto/HxH Crossover? Which Would Be The Best?

So, many of you might know or remember that One Piece did a crossover with Toriko & DBZ. The main point of that crossover was to raise Toriko's popularity, however it failed. It got canceled a later while. Now I will go over in which I believe would be the best series to crossover with One Piece. It would be Bleach.

Now I will go over why I don't believe...

One Piece X Bleach/Fairy Tail/Naruto/HxH Crossover? Which Would Be The Best?