Actually Naruto is an uzumaki ashura lead descendants of the senju but he was revived in an uzumaki. So technically that assumption that no more reincarnations is null. There are many people with blood distant relations to indra I'm sure.but rinnegan wise he didn't need the entire uchiha he already stated madara was all he needed

_@: it's not like he didn't know obito or revival techniques...oh wait. Madara already planned ahead to revive himself so the rest of the uchiha were irrelevant.
In fact if you watched the filler OBITI UCHIHA killed the clan NOT itachi. It was a filler episode itachi only killed his parents.
and the keeping konoha a super power didn't really dely the plan...if anything Minato causing obito to lose the kyruubi out of his grasp delayed the plan Minato and hashirama most likely are the ones that delayed it.
itachi is a great character but in the end everyone was used. Zersu used the akatsuki, itachi was in akatsuki, itachi read a Wikipedia page and believed it therefore he was manipulated. I can understand if you're an itachi fan but I honestly have to say he got manipulated