I don’t think your link is working, and when I copied the Amazon bit out it took me to a general search page, so I couldn’t see the tapes you were talking about; however I agree that it sounds odd for tapes to be coming out in 2011. However, I did find a series of CD releases scheduled for 2011, so maybe it was a typo on Amazon.
Asterix the GaulAsterix the GladiatorAsterix and the GothsAsterix and the Big FightAsterix and the BanquetAsterix and CleopatraPersonally I’d never bother pre-ordering something for more than a year away, partly because they may never appear, and especially since there is such little information. It doesn’t say if they are adaptations with someone telling a story, or dramatizations or what.