Twin Bloodline Naruto
So, I got this idea from watching My Hero Academia.
What if Naruto had a high enough affinity with his parents' elements and the fire element from Kurama's influence that he gained two kekkei genkai?
Basically, Naruto gains the ability to use both Ice and Scorch Release, similar to Todoroki using ice and fire with his Quirk, thanks to a combination of Water + Wind (Ice) and Wind + Fire (Scorch).
I always thought it was a bit of a shame that Naruto didn't learn more jutsu not derived from his shadow clones and Rasengan. Plus, it would give Naruto an interesting direction for his growth after the meeting with Haku, where he tries to copy Haku's techniques.
Since we know shadow clones send information back to Naruto after they dispel, it would be relatively easy for Naruto to develop the styles with his other training. Especially if he has people to point him in certain directions they've seen the two kekkei genkai being used in. For example, Jiraya or Hiruzen helping Naruto further develop Ice Release by telling him about techniques they saw the Yuki Clan used during the wars. Or possibly Jiraya having Naruto develop his Scorch Release similar to the Rasengan.











