I'd investigate beyond the norm of nursing and diaper changes. True, if you're nursing it may as well be you that's up doing the nursing which is generally followed by a diaper change, etc. However, if it comes down to a baby who is fussy and up a lot at night he needs to be ready and willing to take shifts walking around with the babe.
I'd also be looking at the huge subject of if you plan to be a stay home mom or are you also working outside of the home. Being a stay home mom is a lot of hard work on its own. If you add in your working outside of the home as well then her really will need to step up to the plate.
It's hard to grasp the reality of newborn care until it's there in your home, but it's constant and unpredictable and it's certainly not lounging around eating chocolate and watching tv. He will need to be brought into that enough to have a working understanding of your day and duties and respect them.
You also have a lot of time to prepare for this, might do good to talk to some other couples in your lives who have children to learn from them how their lives were changed and what types of routines and divisions of labor they have tried and what worked/didn't work.