The next-generation Kia Carnival, also known as Sedona in the North American market, will soon be revealed and therefore some information is starting to appear about this model. The most important piece of information is that the new model will have a more boxy look, similar to the Kia Soul.
The image you can see below, that supposedly is a "leaked designer rendering" of the upcoming vehicle, gives us a good idea on what to expect when the Sedona/Carnival is revealed.
This idea is supported based on spy images of test vehicles that have been caught on the road in Germany. From what we can see, it uses a wider "tiger nose", which has become a trademark of the South Korean car manufacturer. The rest will have to wait for the official reveal.