Sunstorm will also be seeing a US release, but he looks to have much more gritty and detailed paint apps than the original Japanese Takara release.
And in an interesting and surprising twist, Toys R Us will also be carrying the "Hybrid Style" G1 and Movie style Optimus Prime figures originally only released in Japan about five years ago.
From the pics, these don't look as good as the original releases, of which I have the G1 Optimus and it is an amazing figure. He only stands about 4" tall, but he's super-articulated and, next to MP-10, is the most perfect representation of G1 Optimus out there.
The original also included the trailer with all the bells and whistles, but it looks like this 2-pack will only be the figures without trailers.
Thanks to TWF2005.com for the pics and info.
All this info is unofficial at the moment, but I think the pictures speak for themselves.