castlevania nocturne, it was supposed to be continuation of the lore of the 1st series, but its pretty bad in many respects. it does try to use nostalgia, but not in the correct plot format. although the 3rd season, if there is one would be better. basically the main antagonists dint capture the audience like the 1st series, in the first 2 seasons.
heard ROP was terrible and extremely expensive, it made sense it cant capture the magic of lotr trilogy. invincible, everyone noticed the animation degraded each season, perhaps funding, and then the amount of time between seasons(mid-season) made the audience rather read the comics instead.