I personally hope they would not adopted the norwegian way of title after marriage, especially when Sweden already adopted equal-gender rules.
I would hope they adopted the Spanish or Belgian way of title after-marriage. if this is the case :
- Crown Princess Victoria's husband would of course become Prince Consort & Duke of Vastergotland
- Prince Carl Philip would still be HRH and his wife will be HRH Princess of Sweden, Duchess of Varmland
- Princess Madeleine would still have her HRH, and her husband will be Duke of Halsingland & Gastrikland
but, (i really hope not), if they prefer the norwegian way, then Madeleine would be Princess without HRH, and her husband would not have title.
then again, looking at precedence, the King's sister are still HRH, but do they still be HRH or not? (i'm not sure...)
however, that all happened before sweden have equal-rule of gender, right?