One way to combine the characters' powers is by using the Avatar's ability to enter the Avatar State. In this state, the Avatar has enhanced power and connection to all elements. A Naruto character could somehow tap into this state, perhaps through a special jutsu or seal. Then they could use the Avatar's power to manipulate all four elements along with their own chakra - based abilities. Also, the Naruto characters' use of shadow clones could be applied to bending. A firebender could create multiple clones of themselves using shadow clone jutsu and then have all the clones perform a fire - bending attack simultaneously for a much more powerful effect.
Naruto's powers are based on chakra, while Team Avatar uses bending. But Naruto could use his chakra to enhance the team's abilities. For example, he could use his chakra to boost Aang's airbending speed. His shadow clone jutsu could be used for reconnaissance or to create distractions during battles. His Rasengan could be a powerful close - range attack against opponents that the benders might have trouble with at close range.
One idea could be exploring the relationship between the new characters introduced in Avatar 2 in more depth. For example, a fanfic could focus on the friendship or rivalry between two young Na'vi from different clans. Another plot could revolve around a human character who becomes stranded on Pandora and has to learn to survive with the help of the Na'vi. They could discover new areas of Pandora that were not shown in the movie, filled with unique flora and fauna. A third idea might be a fanfic that delves into the backstory of one of the main Avatar 2 characters, perhaps their family history or how they came to be in their current position.
Pepper Potts. She is very close to Tony and knows him well. She might notice some strange behavior or small signs that lead her to suspect he has hidden powers. For example, he might unconsciously use his powers in a moment of stress or danger when he thinks no one is looking.
Maybe he doesn't fully understand his powers yet. Tony Stark is a scientific genius, but new powers might be beyond his current understanding. He could be worried that if he reveals them too soon, he won't be able to control them properly and might cause harm. So, he chooses to hide them while he studies and figures them out.
I'm not sure specifically if there is a fanfic exactly titled 'sakura hiding pregnant'. There are so many fanfics out there in various fandoms that it's difficult to say for certain without a more in - depth search through relevant fanfic platforms.
Some might focus on the training of an Avatar's feet. Since the Avatar has to master different bending forms, their feet play a crucial role. In a fanfic, it could be about an Avatar's struggle to perfect the stances that require precise footwork in firebending, like the quick and powerful movements. Or in airbending, where the feet need to be light and flowing. This could also tie in with a mentor - apprentice relationship, where the mentor corrects the Avatar's foot positions to help them improve their bending skills.
To write a compelling character in an Avatar 2 fanfic, start with a clear backstory. For example, if it's a Na'vi character, think about their family, their clan's traditions, and how they grew up. Then, give them a unique personality trait. Maybe they are overly curious like Jake was in the first movie. Also, give them goals. It could be something as simple as wanting to be the best hunter in their clan or as complex as trying to bridge the gap between the Na'vi and humans. Physical descriptions are important too. Describe their blue skin, their long braided hair, and their big, expressive eyes.
One interesting storyline could be about a human who is stranded on Pandora and has to learn the ways of the Na'vi to survive. They form a bond with a particular Pandora creature that helps them in their journey.
In a crossover fanfiction, the interaction between Ben's powers and the bending in Avatar could also lead to new power - ups or evolutions. Maybe by being exposed to the chi - based bending, some of Ben's alien forms could develop new abilities. For instance, his Swampfire form might gain the ability to control plant - like elements in a more refined way similar to how an earthbender controls plants. And on the other side, benders could learn from Ben's alien forms about different ways of using energy and physical strength, which could lead to new bending techniques.