Rosters are wiped. Every active NFL player goes back into one pool, ranked on a dynasty blend of youth, positional value, and current talent. Pick a team, run a full snake draft in the real simulator, and your seven-man core gets a dynasty grade. Play anytime, as many runs as you want.
Your core is valued on a blend of age, positional value, and current talent, then compared against what the other 31 teams drafted in the same run.