Things are very quiet with Haas. What I can find says there is no drama and that they are on schedule for 2017. They have passed crash tests and expect the 2017 car it to make its track debut a few days prior (filming days) to the start of official testing in Barcelona. No mention of a formal PR event to unveil the car yet. There have been a few shots on the team's Instragram account in which you can see bits of the 2017 car. It seems the photos are from K. Mag's seat fitting at the Dallara factory.
https://www.instagram.com/haasf1team/
I assume the suspension is still sourced from Ferrari. I wonder how much of the 2017 car was designed in house vs. Dallara. Given the info above (seat fitting at Dallara), I assume the 2017 car is being produced by Dallara for Haas.
Richard