I think he would be a great shinobi and his pupil would be Kage. Him and Naruto a little to close in age and follows the current trend. 3rd Hokage, Jman(great shinobi), His pupil Minato Hokage. So Naruto Hokage, Kohonomaru (great ninja), His puil ________ Hokage.
Dont know about this theory because Tsunade threw it off she made it more of a generation thing. There was no one from Jman's generation to be Hokage til her. their has yet to be someone from Kakashi/Asuma/Guy/Shizune/Kurenai generation. Thaat may be Kakashi of course before even Naruto
It seems three thing you must have to become Hokage officially
Recommendation from the council (Naruto wont get this because the two elders will view him as immature though Shikamaru's dad will recommend maybe)
Approval from the Fire Lord (Naruto could get this because the fire lord basically looks for someone who has the Firsts will passed down)
Lastly you need the Jonnin's vote of confidence (Naruto could get this because all the Jonnin acknowledge him as a force on the battlefield. Hell he's fighting Tobi with B)
Konohomaru won't get either of these.