the team Lindstedt/Zimonjic seems to be history.
Nenad will play with Benneteau in Mone Carlo, Rome, Madrid (someone wrote this on twitter) No idea about Robert.
The first line + plus the fact that Nestor doesn't have a partner made me think that Nestor/Zimonjic could have been back together.
I doubt the Nenad/Benneteau partnership will last. In a career spanning 135 tournaments(ATP level) Benny has had only one non-French partner with whom he played more than one tournament(Jamie Murray, 3 tournaments). If you count futures and challengers too, there is just one other player(Jun Kato, 2 tournaments). I'm surprised to see that they have committed to three tournaments together.