We know that Van Augur is a well known sniper from Blackbeard’s crew. Blackbeard team is absolutely trying to strengthen his crew and in order to conquer the sea as well to improve his power, and now for his crewmate Van Augur I believe that he will get the Aim Aim Fruit or they might already have it.
On the other hand he would get the Mato no Mi “Mark Devil Fruit” which they are going to steal from Fishman Island’s Vander Decker. That way, Van Augur would be the best expert sharpshooter and none of his targets would have the capacity to escape from him.
With that he would have the capacity to overcome Yasopp and would be dreaded by all as the individual because he surpass the sharpshooter from Shank’s group, Yasopp. That is the place where Usopp came from.
On the upcoming episodes, Usopp will need to battle and defeat him. By vanquishing somebody with the Aim Fruit or Mark Fruit, Usopp will turn from a silly sharpshooter to the best expert rifleman on the planet.