There will be a Japan Tour Special Limited Edition of This Is Us being released on January 20 according to HMV.co.jp in Japan. It will have a brand new album cover. 

Plus a DVD with a live performance of Straight Throught My Heart from the O2 Arena in London and footage of BSB in Japan.

Also the album will include four bonus tracks Helpless Feat Pitbull, International Luv, On Without You, and a Jason Nevins Remix of Straight Through My Heart.

Thanks to Tony for the info.