I like the line up for JLA but was heavily disappointed by Johns Justice League so I will give it a weary shot.
Vibe, I know next to nothing about so I will wait for word of mouth/reviews but I am not sure if they can do for every unpopular character what they did for Aquaman.
Katana, would have been the book I would be most interested in were it not for Nocenti.
Again I haven't been following the news to closely but I will more than likely give Threshold a shot. I like Giffen and cosmic stories plus he wrote the original Annihilation at Marvel so pretty high hopes for this.
Overall though this is the least exciting new wave of books in my opinion.