Well theres no info out yet but please DO NOT (!!!) give the winner crone tax !!
That would ruin the server.
Winning reward should be the costume we all used to know, with like 30-50 bonus all stat + the regular 3 sockets for patterns
and some small amount of insignias for every1 who took part & a smaller amount for all other guildies maybe (obviously only for Level 30/40+)
OR
An insignia box('s) for the guildleader, tradeable!