Option 1
Naruto is a childhood friend of Jack Atlas and/or Yusei (any dragon synchro deck, can be the brother of Jack Atlas)
Option 2
Naruto gains the ability to speak to duel spirits and Sayer takes him for the Arcadia Movement where there he meets Akiza (Chimera Effect idea modified) (any synchro deck)
Option 3
Can be the signer for the soul of the dragon (any dragon synchro deck)
You can pick any option (ex. option 1 and 3 is Naruto is a friend of Jack Atlas and Yusei and is the signer for the soul of the dragon)