Heh heh, that's called "Self-fulfilling Prophecy".
It's also you Jedi-Mind-Tricking yourself prior to your purchase.
It also happens AFTER purchases in order to trick yourself into thinking your purchases were justified. Sort of 'willing yourself' into believing something is great because you already bought it.
I've done it with a few shirts I've bought. Happens a lot with games, too.
My opinion? It 'could' be a great game, at least gameplay-wise, but I like my Castlevania adventures to be a solo ordeal, and this seems like it's sort of going the Four Sword Adventures route; yeah it could be good but even at its very best it won't beat a single-player CV... and the plot (if there even is one) is sure to be more paper thin than the regular Metroidvanias, if that's even freakin' possible.
yet single player and story isn't going to convince players to keep playing for years to come. (maybe those single player story games are played once a year. but players years from now who play CV:HD with friends will be playing this at least once every week/month, if not every day/week.)
People still play TMNT arcade once in a while to this day because it can be played with others online.

I remember on XBLive the first year TMNT was released, there was tons of players playing it every day for the whole year (and beyond), even this clan called the Shell Shockers (lol a clan for TMNT?). Of course nowadays there's no one really on.
But that was just a linear arcade game with no loot to find or more unique playable characters to use in more open enviornment, but Harmony of Despair has plenty of reasons to come back for more, even after you 100% everything. And 6 player co-op means bigger groups will choose this game to play with their friends together (instead of 4 playing and 2 doing something else like is the case with generally all online co-op games out there. The only exception being America's Army and it's 16 player co-op.)
Harmony of Despair will truly revolutionize friends playing online together with the Castlevania flavor, and that's something never experienced before at this level of nostalgia, quality online and big screen goodness with some Castlevania favorites available
and possible room for expansion!!!
And that's just the surface of this exciting release! ^.^