Most teams will show their new car during February, that much is known. However we need to actually see them running, they need to be tested to see actually what happens. I mean don't get me wrong the style of the car matters a lot, an ugly car usually doesn't really impact that much but marketing is very important in this sport and without those cars getting attention, we are not going to get too much money. Remember those pink bwt cars? Most people hated them for a while, then it grew on us right? So marketing is important but not really "that" important.
We know how black and silver Mercedes will be, and how red bull colors for red bull, those are all known. The only important thing is, these cars have a brand new design and that could change a lot of things or maybe not change anything at all, we need to see that and figure out who will be what.
i dont think that we are going to see ugly cars for the new season because the designers have a simple design to use there is no complexity in it as there is no barge boards possible the complexity we will see under the car but at the end the paint is going to be the most distinguished thing about the car to make it get the attention and marketing, i think in the recent years all teams nailed the marketing of their cars making it more appealing to fans.