RS.com have confirmed that they will be offering an incredibly generous prize in this Challenge.
The prize will be a complete set of all DLC available from RS.com 'at the time the prizes are issued'. That means that if there is any new DLC between now and the time the winners are decided, that will also be included in the prize.
With such tremendous prizes on offer, I now wish I hadn't ruled myself out
Still, this leaves more chance for the rest of the Challengers to win something.