Congrats on getting offered a position in the new Versant cohort! I interviewed on January 21st with the panel and have not heard back yet. I called HR today and was told that the last group of interviews with the panel were conducted on this past Wednesday. I was also told that they have decided to open up 10 more positions than they had originally anticipated. With so many candidates and positions, I'm assuming it may be until the middle of next week when final decisions are made.
As for the HR paperwork - After the one on one interview with the HR rep before the panel interview, candidates were given a packet of information that would be used once hired. It included a page on employee benefits and then a few pages of instruction on the background check they will perform and the medical screening test that will be set up before you start a position. I'm sure there will be more paperwork for you now that you're officially hired on, but that's just what you may have missed from the panel interview.
Good luck with the program!