It's possible, because he only has one affinity chakra nature right now. Most powerful characters have more than one, so it wouldn't be surprising if he gained another. He can use magma and magnet release due to the biju, but that's only while they are with him in speculation and I don't believe any of them posses that affinity. Plus, if he could use chidori he would just combine it with rasengan to make a new variant. Same old same old.