Disney is changing the annual cards big way. The Dream passport which gives 365 days entry is currently for £170 would not be available after 28th March.
Go to the link and click "Receive a call" button. You get an immediate call. Works on Saturday too.
Ask for Dream Pass. They take payment and you get email with the confirmation which u need to print and take and collect the cards there.
Other passes may be available cheaper as well but there are block out dates.
Check the different options and benefits here.http://www.disneylandparis.co.uk/annual-passports/
The Dream passport is £195 herehttp://www.supertrips.net/book-tickets/adult-12-annual-dream-pass-disneyland-paris/
It came out cheaper than 4 day tickets for me. Now there is a 4 day for price of 3 deal for £124 which makes this passport £47 more for me but need to go only once more to recover.
You can also upto 50% discount on some Disney hotels but I found a 4 star cheaper option just 20 mins way.
I am going during Easter but if I am not wrong this passports can be activated upto 6 months from now. Please confirm when you buy. Valid for 1 year after activation.