It appears wave 2 consists of 10, 15, 20 and 25 piece mutli-packs so far available through Amazon and wholesale. Reported results so far seem to indicate only one previously released title per multi-pack box, however. No new stickers have been reported.
Here is what I have seen confirmed so far:
From 10 piece boxes:
Jerkens
Nuttibrain
Slop Tarts
Hairy Combs
Commie (BLACK TOP)
From 15 piece boxes:
Hairy Combs
Nuttibrain
From 20 piece boxes:
Fib
Grand Theft Audio
Hairy Combs
Jerkens
Slop Tarts
From 25 piece boxes:
Grand Theft Audio
Frosted Snakes reported by several but I don't know which box(es) they were in.
In my boredom as I await finding more series 3, I picked up a 20 and a 25 pack. Got a Jerkens in the 20 pack, which I was happy with, and a Hairy Combs in the 25 pack. Given that the Hairy Combs is not listed in the 25 pack list above, am I the first to find this mini in the 25 pack? I would much rather have found GTA, but so it goes.
Oh, and I found a Slop Tarts in the 20 pack as well. Could have cared less about that one, but it's interesting that there were two "rare" ones in the same pack.