Suigetsu hoshizukimaybe he found jugo and the other guy i forgot his name.
Itachi said he wasnt going to attempt to deal with Sasuke so that fight won't happen. Only thing about it being the reinforcements he is looking at is that I'd Sasuke fought the army then Sasuke would have to win cause he has to fight Naruto and that would kill off all the kohana people that everyone likes excluding that huge bitch Sakura I mean I beg for her to get killed every manga..... Anyway the look was most likely for dramatic affect he could have been glancing at any random thing that way in the manga.looking at kabuto whos currently crapping his pants. sasuke vs itachi next chapter.