There's not a schedule on this, and-- similar to Marketplace creator uploads-- there is doubtful to be a schedule for this in the foreseeable future. In both these cases, Roll20 is taking on outside material at an unknown pace. We cannot determine when we'll have a "critical mass" of character sheet changes that need merged or amount of Marketplace packs completed that need to go live. While it's true in both cases that folks on staff have a time they "usually" look at the pile, depending on the size of what's there it can greatly change the amount of time they need to prep things. So much so that an estimate on when the results are regularly going to happen would probably prove more frustrating to the end user than actually illuminating. There's a reason game developers go "SOON (TM)", and for the time being that method is absolutely what's most accurate for Roll20 character sheets.
