Time for some math! Hopefully its all correct
So based on the math of 70 cards numbered to 240 @ 2 per box, there are 8400 boxes total, @ 12 boxes per case that's 700 cases, which was mentioned earlier in the thread and now looks like its confirmed.
If there are 9 jerseys, that means that:
If sig variant is numbered to:
50 it would be ~1 per 1.5 cases (1 per 18.7 boxes)
75 it would be ~1 per case (1 per 12.4 boxes)
100 it would be ~1.3 per case (1 per 9.3 boxes)
If the non-sig variant is numbered to
200 = 1 per 4.7 boxes
250 = 1 per 3.7 boxes
300 = 1 per 3.1 boxes
350 = 1 per 2.7 boxes
400 = 1 per 2.3 boxes
450 = 1 per 2.1 boxes
475 = 1 per 2 boxes
... a massive 900 if it were 1 per box
So based on the above my guess is that sig versions will be /75 and non-sig somewhere between 300 and 475, possibly 400 if the sig version replaces the non-sig odds meaning that overall odds are 1 per 2 boxes to get either a sig or non-sig jersey.
All of this assumes that other hits are not replaced by the jersey and are the rarer 1 per multi-box hit, which would make sense imo.
Based on my guesses of /75 sig version and 400 non-sig, so far its shaping up like this:
1:XX Certified (I think this is low end insert, not numbered and 1:6)
1:18 Rookie Card
1:36 Certified Signature (Assumed)
1:72 Certified Jersey
1:432 Certified Signature Jersey