Naruto and Sasuke's arms
He basically said he needed time to atone for his sins and that is why he went off on his own.  It is almost like he is telling himself that he deserved that. Inside Naruto's bandages are cells from Hashirama that are meant to regenerate his arm.  I am assuming in the future when it is fully finished, the bandages will probably come off.  It is also possible Sasuke will take the same treatment some day.