It has been well reported that we will be able to trap villains and use them in the upcoming Skylanders Trap Team. This also includes the likes of Kaos, the main villain over the past few titles. This of course requiring a special add-on to the physical game in the form of keys which are purchased separately like all of the toys; this would include the special Kaos trap. That is if you don't purchase the new Skylanders Trap Team Dark Edition Starter Pack.
In this pack for Skylanders Trap Team you will get said trap key for Kaos, as well as variant prints for the basic starter edition packs, the new portal, and two extra trap keys. All for the price of $99 for the Xbox 360, Xbox One, PS3, PS4, Wii, and Wii U versions of the game. To be honest, while Skylanders Trap Team will be yet another resource sink for all of the toys, this is quite an awesome deal given the exclusivity and extras that will be coming over the standard pack.
There is no information on if the variants for the Skylanders Trap Team Dark Edition will have any different powers or skills. I am going to err on the side of no as the other special characters in the past didn't but who knows. That information is on my block to ask about here at SDCC while getting to play around with everything. I hope it will be a dark day but in a good way. If you can understand the bit of humor placed there.
No I leave you with a look at the Skylanders Trap Team Dark Edition and variants if you haven't already begun clicking through the list already.