Although Indian cricket team has defeated West Indies easily, it's going to be a tough challenge to beat New Zealand in their own den. Also the tour is still five months away and India has 2 test series to play before that at home. While playing a series at home boosts confidence, at times it gets the players into some comfort zone. They develop some chunks in their techniques which get exposed in alien conditions. Basically there are pros as well as cons too.
1-Having a good amount of cricket at home can boost the confidence of players because India is the team with best record at home in past 15 years. Leaving for an away tour with a lot of Ws ahead of your name surely boosts the confidence.
2- Indian fast bowlers won't be needed much in Indian conditions so there's no chance of burnout and injuries prior to the New Zealand series. We all know how important the fast bowlers are while playing a test series in New Zealand
3- Most of the home series in India will move ahead parallel to Ranji trophy, India's premier domestic competition. So India has a lot of options during the first phase of home season to test new players. This will reduce the stress on regulars and India might find a new star to go bang in New Zealand.
1- Players, especially batsmen develop chunks in their techniques while playing a lot of games at home. They adopt according to the conditions and we all know that since West Indies and South Africa are touring, the wickets are going to turn square.
2- The spinners go flat and quick in Indian conditions at times because the tracks provide sharp turn in this case. They get used to it forget about giving some air to the ball. Although in modern days, such mistakes are identified and fixed quickly, the muscle memory gets in the way sometimes.
So yes, the India vs New Zealand series is going to be exciting. We are going to have some top players of this generation like Virat Kohli, Kane Williamson, Trent Boult and Jasprit Bumrah going head to head. A mouthwatering contest awaits if everything went well.