I was not aware of this previously but in my research I discovered that Ben and jerry's once before tried a different Pesach flavor called Matzo Crunch - adding chocolate covered matza to vanilla ice cream. It did not last beyond that one Pesach many years ago because it was not good - the matza lost its crunch and got soggy too quickly. 

Ben and Jerry's Israel has now announced that they are making a new flavor for this Pesach - matzo crunch, again. Hopefully it is redone and reworked and will be better than last time.

I am definitely going to look for it to try. The biggest problem is that sometimes they dont sell these temporary flavors in the stores, or at least in most stores, and you have to go to the factory outlet stores to get them. That is the case with the new Matzo Crunch flavor, as per the article in Israel Hayom.