Well, this would depend on the brand. If it's going to an upgrade then there are the chances that the brand will discontinue the 2nd generation. Rest we would suggest you to wait for the official announcement. So, we would suggest you to wait for the launch of Hyundai Elite i20 2020
As of now, there is no official update on the launch of the new i20 from the brand's side. So if you are planning soon then you can choose to go with the Baleno Zeta and if you are planning after a couple of months then we would suggest you wait for the launch of the new Hyundai i20 so that you can compare both the cars and can choose the right one according to your need.