The Star Pack Battle Royal will be released in Europe on March the 9th and it's a TCG exclusive product. That means, unlike most of the "larger Yu-Gi-Oh! sets", it won't be available in Japan months in advance, which in turn means that no one can spoil the contents of the set early. Many players are looking forward to the new set for this reason as they won't know what the boosters will be packing.
Just like some of the older Duelist Packs, Star Packs are small releases entirely consisting of reprints. All booster packs of Star Pack Battle Royal will consist of 3 cards - 2 Commons and 1 Starfoil (sometimes referred to as Shatterfoil). The suggested retail price per pack is a super affordable 99 Cent, so you'll be able to get your hands on Starfoil versions of some of your favorite cards for a relatively low price.
There are a number of cards that have already been confirmed: Performapal Secondonkey, Bloom Diva the Melodioius Choir, Frightfur Fusion, Odd-Eyes Rebellion Dragon, D/D/D Duo-Dawn King Kali Yuga as well as the Yosenjus together with their support card Yosenjus' Secret Move.
All cards in the set except 1 will be available both as Commons as well as Starfoils. It hasn't been released which card will be only available as a Starfoil. A booster box of Star Pack Battle Royal consists of 50 packs.