Hi, Hex, welcome to TUG!
It is hard to say what will happen in this situation, both because we don't have information on the specific situation facing the resort, and because most of us here aren't familiar with European laws. You might want to also post your question on
www.timesharetalk.co.uk where participants will be much more aware of European laws.
That said, the situation here is not necessarily as bad as it may look at first. If the timeshare were truly worthless (say, in the Canary Islands and facing high annual fees), then if it goes bankrupt, you have lost little (since it wasn't worth anything to begin with). Plus, you will probably be out from under any obligations you had, such as the annual fees. Since timeshares are currently VERY much a buyer's market, you will be easily able to pick up another timeshare for little or no cost. Now that you have found TUG, you can use the advice here to get the most value for your annual fees, which may save you quite a lot over what your old timeshare was charging.
As for your RCI membership and deposited weeks, any weeks that have already passed their check-in date will almost certainly be honored. As for weeks in the future, that is less clear. Have you already paid the dues for future weeks? (For example, have you paid your 2009 and 2010 dues?) If you have not paid the dues on future weeks, then you really haven't lost anything if those weeks aren't honored. Once you use up any deposited weeks, your paid-up RCI membership can either be refunded, or you can keep it and use it for access to RCI's last-minute rental deals, which are often very good.
Ironically enough, owners of poorly-performing timeshares can be better off if the timeshare closes than if it continues. The real question is (as Timeos2 notes) how easy it will be for the timeshare to liquidate. I don't know about the laws in your country, but hopefully you can just walk away, having lost nothing but a share in a resort that was worthless to begin with. Then, since it sounds like timesharing has fit your needs well, you can use the resources here on TUG to make a fresh start in a timeshare that is a much better value.