On a serious note, though: I personally dislike the idea of a female Thor, and if there were ever to be a movie about her, I wouldn't see it. If only because I'm so used to Hemsworth's Thor that it would be difficult to like any other version. The same is true of Captain America; I just don't think anyone else can really fill Chris Evans' shoes as that character on film. Maybe in the comics, it's changed. But in the films? I think that change may be a long time down the road.
Also about Guardians; I haven't decided yet if I'll ever see it. It doesn't look that interesting to me. Agents of S.H.I.E.L.D. execs have hinted at doing tie-ins from Guardians, so I may see the film to understand the tie-ins better. But I'll wait for the dvd to come out.