Konohamaru,in my opinion,he is going to be strong,very strong because of the training that Naruto-sensei(xdxdxdxdxd) will provide him:Rassengan(already),Kage Bunshin,maybe sage mode(but i dont think that Konohamaru is going to mastered it fully)...so he is going to be styrong but not as much as Naruto..