Potentially, but probably not anytime soon. It's a fun idea, but a complex system like that is pretty much required to be done at the very start, so it's unlikely I'll tack something like that on at this point!
Enemy resistances can be tricky to handle. Usually, I'll try not to block players out like that, just because it's not much fun to be forced to retry a battle just because you didn't bring the right load out!