If you didn't already know, back during the Ninja All-Stars Kickstarter, Ninja Division added in some bonus cards that would allow players to add in Ninja All-Stars models into their Super Dungeon Explore games. The aptly named Ninja Pack was a simple pack of cards for use in Classic and Arcade Mode of Super Dungeon Explore and brought a new paired spawning point to the game.
It was a nice addition, and I love variety as much as the next gamer. But from a collector's stand point, I didn't like the idea of mixing components or breaking down part of the Ninja All-Stars rewards to use them exclusively for games of SDE. I also had a problem with the idea that a Super Dungeon Explore focused gamer, that is a completionist would need to buy an entire game that they may not be interested in just to finish off their collection. I also may have been vocal about it whenever Ninja Division posted polls asking about future crossovers.
Luckily all this was solved with the announcement of Super Ninja Ambush!
Not only does this box set give you everything you need to run two sets of paired spawning points worth of ninja models (the original Ninja Pack only included enough cards for a single paired spawning point), but you end up doing so fairly reasonably too, without the need to buy into Ninja All-Stars if you don't want to.
Also, it acts as a dual purpose release for Ninja All-Stars, in that it is an official release of the Earth and Wind shrine ninja. Before this release, the only way to get them was if you were a Kickstarter backer. Plus, a person could use these models for league play at their local shop, without having to buy into Ninja All-Stars fully.