Well, watching it on a calibrated SMPTE broadcast monitor, the image is not too dark, in fact it is spot on, the colour saturation is a little high, but not overly so - certainly nothing like the screenshots posted.
The problem is that most people adjust their TV to a disc they think is a good reference, but in reality their colour, contrast and brightness settings are way off.
If you don't have access to a colour analyser, then I would at least buy the AVIA calibration DVDs and set your TV up properly.
Having said that, I use a DVD player that remembers the gamma, colour and brightness settings for each disc, as some are so far from reference specs that you need to adjust your unit to get the best picture.