The prizes this time are BB Senshi Sangokuden Ecopla. In the promo poster, only Ryuubi is shown, but I believe more characters are going to receive the same Ecopla treatment for this event as well. Another prize is a mat (? - 下敷, maybe mouse pad istead ^^;) with BB Senshi Sangokuden drawing.
Also, seems like it's going to be limited to Japanese stores as well (実施していない店舗もあります), so I'm not sure if international fans are going to get the chance to own a BB Senshi Sangokuden Ecopla from this event.
There are two periods for this event: August, and September and beyond. More details to be disclosed in the July and August issues of Kero Kero Ace for each period respectively.
Image and information from Hobby Shop Midori.
On the other hand, Bandai Hobbysite has introduction on the two 1/72 Transformable Armored VF-25s to be released this month:
Ozma Lee's Unit - Release date: today (11th), 8,400 Yen (inclusive of tax).
Alto's Unit - Release date: 25th, 8,400 Yen (inclusive of tax).
Images from Bandai Hobbysite.
