You need it to be a crumple zone because head on is deadly and common and you don't need it for much else with an EV so I'd guess it will be storage. Most imagined energy sources, even if not explosive, are best not put in the front crumple zone and the weight of the energy storage is best kept low so designs will favor low batteries under the car UNLESS they go with a battery swapping design, but I still don't think they'd do that from the front vs the back.

Maybe someday cars will not need crumple zones, like airbags on the outside or something, but that's not happening any time soon. They just need to focus on making decent cars cheap enough and safe enough to not get a bad reputation on the products right now. Customers will mostly appreciate the new EVs looking like the cars they are used to.