First off, thank you!!
Now... I've found another object that points to this Nordic Mythology-theme, after the press-release on tuesday, pictures, drawings, technical data etc. will be gathered on myterlegender.liseberg.se, translates to mythslegends(.liseberg.se)
Hey... wait.
The thing is that all leads to this - the rides will be named Oden and Gungner, Oden is a giant in Nordic Mythology (where Balder get's it's name). "Giant Awakens", he has two ravens (hence the birds in the video), and his weapon is a spear (Gungner).
The most interesting part is that "Gungner" sounds like the swedush word for swing, "Gunga"... Am I onto something?!