I think they look great, the perception some have had of the new shots appearing darker is accurate, however the actual encode and master of this new Bluray will alow deeper black levels and increased shadow detail so although it appears darker (blacker), there will be much more detail in darker scenes. Dvd tends to have a greyish, crushed looking depiction of black areas, where-as on Blu Ray the extra headroom with having higher bit-rate and pixel count alows the low light scenes to really breathe.
Also, the suggestion that the Aliens re-master is simply an RGB level adjustment is plain wrong, although if you simply don't like what you see i guess you dont have to buy the set.
As for how Aliens is meant to look, i think Cameron knows that more than anyone.
