From their announcement:
Here are the first pictures of the second Infinity Bag coming out this fall. Its called the Infinity Mini aka Beta Bag and will feature a smaller more compact size.
This smaller size is for the gamers just getting into the hobby and looking to test Infinity for the first time. This bag is also great for heading to a local friends house with just a few minis.
This bag and the Infinity Full size bag (aka Alpha Bag) will release at the same time early fall. The Beta Bag will not have the special addition model at launch time since that is reserved for the Alpha Bag.
Ps. There is also another picture of the limited addition model coming out with the Alpha bag.