Spotted by one of your fellow BrandEaters in Huntington Beach, the new sundae is simple enough. It features hand-scooped vanilla ice cream and fudge (or chocolate syrup) inside of a waffle cone bowl.
The ice cream is an existing ingredient from the chain's shakes, as is the syrup I believe, which leaves the waffle cone bowl as the only new ingredient. It's unlikely that they make the waffle bowl in-house as: one, they would probably mention it on the poster if so; and two, it would require the investment and kitchen space for added equipment.
I'm a little surprised that it isn't a waffle cone sandwich or burrito or something along that vein.
Photo by Junk Food Junkie.