Guild Wars 2

do these drop in a tot bag? So many people are playing HoT im hearing little about halloween.

also can the old skins, Greatsaw and such, drop in the mad kings dungeon again?

From the Halloween page:

Collect tattered bat wings to start the process of building a wonderful bat-themed shoulder piece.

Not sure what else is involved sorry.

craftable drop from tot bags I believe

From reddit: The first step to get “Bat Wing” is thus:
4x Tattered Bat Wings
250 Mystic Coins
20 Bloodstone Bricks
120 Powerful Blood

Step 2 req Glacial Lodestone, but we don’t know what else yet.