I am expecting mp-10 to be reissued as TRU-exclusive in the fancy box anytime. Since they going to introduce Prowl and what not, they will do this.
MP-10 wasn't a hot seller because a bunch of collectors like myself already have the mp-1 and 4 version, there wasn't that much vision to think Takara decided to push the entire line rescaled. By the time I wanted a mp-10, is at ridiculous prices.
The only issue is whether Takara will go through the trouble making a resized Megatron as they know it will be hard selling in other countries. I hope they do Gelvatron MP instead so it could be sold much easier, afterall there is a Rodimus around.