SOURCE

Reports are coming in about the next Masterpiece figure from Japan.

According to Joel from BigBadToyStore.com, who called it "MP-10"
We’ve just received word from Japan that the Transformers MP-10 will be released in September, the retail price in Japan is 22,000 yen, we have preorders listed at $249.99

The name has currently not yet been released, but we were told it is a ‘New’ figure and the name will be revealed soon.
Some are suggesting a new convoy, possibly powermaster!!!

No pictures yet. Just a placeholder blank image. Obviously "New" is not the full name, but It might lend credence to the rumors that the next MP is an all-new Convoy mold, as in "New Convoy". The retail price translates to about $278.50 USD. Whatever this puppy is, it's either a multi-pack, or BIG.