Long before Dice Masters was a twinkle in WizKids eye, Quarriors!, designed by Mike Elliot and Eric M. Lang, was the granddaddy of Dice Building games. It followed traditional releases in the form of big boxes for each expansion.
Dice Masters followed later but with a different release system in that you bought starter boxes and booster packs to expand your collection. They started dabbling in mini-releases such as Team Packs (like Spider-Man: Maximum Carnage and Dr Strange) and even released two big box standalone expansions for Teenage Mutant Ninja Turtles.
According to Wizkids:
By shifting the focus of how players buy Dice Masters to non-blind product, we’re trying to lower the barrier to entry for fans who are interested in trying the game fresh or maybe exploring one of the IPs in the game they haven’t tried yet. [source]
The campaign boxes offer a lot of value. Each one has 48 different character cards which could be used to build hundreds of different thematic teams. There are also 10 Basic Action Cards to add variety. Adding in Team Packs will allow players to customize their teams even further. Campaign Boxes are able to store over 300 dice and their matching cards which means it can accommodate the basic set along with 10 added Team Packs.
Cards in the Campaign Boxes are also going to have their Max dice based on the game play but tournament play will be kept in mind when these are released instead of the stifling maximum previously designed into previous non-blind releases.
For more details on the upcoming Campaign Boxes check out the Wizkids Dice Masters page for details.