LoL untill we learn more about the new atsuki member he will forever be identified as the great venus flytrap man. For all we know he may be the greatest naruto character ever introduced. He could be the savior from the Itachi worshippers that all the followers of udon have been praying for.

On another note it would be awesome to see Garra again spending some time in the leaf village. Maybe he can meet naruto and try to cheer him up. He'll probably be depressed for failing the mission. I'd place a good bet that Garra and his three siblings will become the sannin of the sand village. If sannin is not a rank but just an invented title then I still believe they'll become the legendary something or another.

Garra is definetly going to become the future hokage of the Sand village. That i'm sure of.