Naruto Thread (Spoilers For Sure)

As for the person using Rasengan it could be:
Naruto (probably)
Edo Tensei Kushina (maybe)
Obito or Rin (highly unlikely)
Konohamaru (maybe)

All the other people who could use Rasengan are either dead, sealed, or somewhere else.

1. It's not Naruto. Naruto is nowhere near where everyone else is. Even his super fast speed couldn't have gotten him that far that quickly.
2. Not Kushina. She's sealed with Minato. And even if she isn't, I don't think she ever learned this technique.
3. ....what?
4. Konohamaru is plausible.

As far as I can see it, the other person who it could be would be Konohamaru or Kakashi, but why Rasengan when he has Chidori/Sharingan?