Yeah that would be extremely funny. Shes like I DID IT! I FIANLLY DID SOMETHING!
Actually the more realistic thing that will happen is she will arrive with the barrel! Kaguya will be like I have been looking all over for that! At which point Kaguya will realize the enemy is in possession of it and be overwhelmed with fear of her imminent demise! Than suddenly fall into a state of stupified relief as Tenten proceeds to just throw it at her along with hundreds of other random weapons and objects. (Somehow Kaguya is still defeated by the pure stupidity of the situation.)