Hi Todd,
Sorry, I missed your MPR on my first read (not because it wasn't clear, just because I must have been only 1 coffee down that morning! LOL)... totally understandable for a longer logline with an MPR. ?Having said that, so far I still prefer your second logline (another thought I had with the first was that a Holmes character is going to understandably draw a lot of limelight and it's hard to lose a main protagonist character half way through the film (not that it can't be done, it's just hard to do well).
I do prefer the princess to the prince ;) and I really like the idea of them being betrothed... something neither of them probably want, but it's being arranged to stop a war between both nations... and of course, if the princess has been vocal about her dislike of him (on account of her being naive to court politics) then she's also likely to be a suspect...love that and there's tonnes of conflict!
I'm still not getting the leap from his death to warring nations though... It doesn't have to be obvious, but it should be clear and less of a guess I'm feeling. ?Playing with the addition of an MPR, how about something along the lines of:
A?wilful but na?ve fairy-tale princess must convince rulers to release her?from the arranged marriage intended to bring peace to?their feuding nations, but when her betrothed prince is murdered, she must clear her name and expose the real killer?before the situation escalates into all-out war.
It's probably too long... but just playing with options before you whittle it down ;)