Well technically they are already working there, they've been working there for I think two years now (+/- a year, time flys to fast for me to keep track).
This will be good news for those living in and around Smyrna Tennessee because they will probably move most if not all that production back to that plant, which has really cut back production quiet a bit since the Missisippi plant was built.
I know, but there will be an expansion of opportunities with the new production.
Only problem with Smyrna is driving I-24. I am a northerner who was transplanted down there for a year. It was a terrifying driving experience (maybe because I am not a NASCAR fan).
Here the drivers honk and give you the finger. In Tennessee, they never do that (or use turn signals). They just drive 120 MPH and pass on the right, while I poke around at 85 MPH. My first week back home, I got the finger twice because I was a little rusty on directions. I cannot count the blaring horns. AAH! To be home again.
Good luck with the Nissan plant. I liked the people in Tennessee, though I hated the driving.