Naruto could have all sorts of adventures. He could befriend a group of wolves and help them defend their territory from other threats. Or he could communicate with sea creatures and embark on an underwater exploration, uncovering hidden secrets beneath the waves.
There are numerous possibilities. He might get involved in a conflict between different animal tribes and use his ability to talk to them to negotiate peace. He could also follow a mysterious animal that leads him to a hidden ancient power or a lost ninja technique. And, he could use the animals' knowledge of the land to find rare herbs or items that are valuable for his ninja training.
He could go on adventures where he teams up with powerful animals. For instance, he might form an alliance with a giant eagle to explore uncharted areas from the sky.