We can compare the stated philosophies of RBG against those of the two most recent nominees and the shortlisted candidates put forth in the past week and see that they're very different. It seems very plausible to guess that, given a large majority, these people will enact these philosophies. No?
I personally haven't read an opinion from either that most democrats would be disappointed with. Most people actually don't follow what the supreme court does and the extent of the attention they pay is just making sure that the president they support gets to pick SCOTUS justices.