The intent of the whole exercise is to keep Assange in custody, then extradited to Sweden and keep him in custody there until he can be then extradited on to USA.
A bit of historical study of US-Swedish relations would have told you how unlikely that is but don't let your ignorance to do so stop your conspiracy theory.
The Swedish case for Assanges extradition and detention there is based on the complaint of two Swedish women in accordance with Swedish law. Those are the facts.
Do try not to let your imagination run away with you and read too much into it there mate.