Coreau has been pretty consistent here in GR and his big test will come up during the Calder Cup playoffs to see how far he can take the Griffins this season. What he does here in the playoffs might determine where he will be in 17-18. He got his feet wet in the NHL this season and he started out OK, but struggled at the end. Has potential, but he is not quite ready for the NHL. I feel he needs another season in the AHL, but it all depends on the other NHL teams going into next season if they are looking for a backup goaltender.
With the Wings technically having 3 number #2 goaltenders right now, one will most likely be no longer in the Wings organization for the 17-18 season (either through the expansion draft, trade over the summer, or by clearing waivers if all 3 last throughout the summer and into training camp). Time will tell.