Hello Portal Masters,
I found some new info about the battle packs.
According to http://gotgame.com/2012/06/19/e3-2012-preview-skylanders-giants/ they will include:
2 exclusive figures and a special battle-mode arena
and will be 24.99 USD
The first pairing will be Undead vs. Life
But only time will tell.
Will you get the battle pack?
I am still not sure if the arena is worth as much as a third Skylander (since battle packs and tripple packs seem to be at the same price) but so far, it seems to be the only way to get Chop Chop remodeled and Shroomboom non Lightcore (I don't think the battle pack will include the Lightcore version, but who know).
C U next time!