Juice will be back home tonight and I would expect him to start checking rosters as soon as tomorrow. Depending on how many people need to "fix" roster mistakes, I would expect the leagues to start by (or before) the weekend. (I can almost guarantee there will be at least one team with roster mistakes, probably more).
I just spent 3 days getting my lineups and pitching settings ready for the season. In doing so, I had to pull two teams to fix them. I realized one team was illegal due to having only three players from a season. The other team that I pulled didn't have enough innings, so I tweaked the roster.
I would highly recommend doing this before the seasons starts.