I'd rather have Bendis on Flash, than say.... Tom King, even on his worst day because at the moment he's doing ok. Young Justice is good, Action Comics is good for the Most Part, I like what he's doing for some of the lesser known characters- Adam Strange and The Question apparently have big roles in Leviathan Rising and Q was confirmed during his AMA last night to be front and center of whatever Superman event he's cooking up, He claims to love Wally and clearly likes Bart. Sure his Superman (where we have the Infamous Ca Ca Poo Poo incident) needs work, but even with Barry, I think Bendis could do well if he just SLOWS DOWN. If we got the same handling from Bendis of Barry as we do with the cast of Action Comics and he took a more Forensic Scientist/Detective than Outright Superhero Approach then I think him on a Barry Book could work.
As Said here Bendis on a Wally book could work too