My prediction is that it will land near or around the top 25 in marketcap because I believe they will have 400m coins at a price of roughly $2.50 each. What happens after the open I have no idea but that is my estimation for the launch day.
It doesn't work like that. Price is sure to fall after trading starts and added to that NXT hodlers will be receiving IGNIS airdrop which will bring another dump. So, I expect price to hover over $1 in short term. But in long term, I believe an appreciation in price which will more depend upon company's progress and announcements.