The revenge endings so far have been pretty universal in who they impact. If the first two games are any example the revenge ending will involve Leto breaking bad. In both HC1&2 the MCs wind up usurping their enemies and begin to treat their former love interests as property instead of people. So you're getting revenge on the people who ruined your life and on the women who betrayed you. Sooner or later Rose, Cyanna, Lily, and Haylen will choose between their ntr partners and Leto which puts them up as targets for revenge.
If I have one obvious problem with the revenge endings it's how unwilling N_Taii is to punish the women. By his own admission he has difficulty mistreating them. So they tend to dodge the more appropriate punishment and simply continue on with the MC as their dominant partner in place of their defeated partner. So the women skate by and their partners get punished in their place even though they are often just as guilty. So instead of Rose winding up alone, forced to live out her days without her loved ones, relying on empty, meaningless sex to satisfy her urges she'll be a member of harem of the new King Leto or something. The punishment does not suit their crimes, which to me kind of defeats the point.
As for the love ending, that's not really a thing in the first two games. HC1&2 basically have true, good, bad, and 2 added revenge endings. The true endings are pretty typical jRPG endings, the good endings involve moving on for better or worse, and the bad ending is self explanatory.