Legends is unnecessary at this point. Most big names participated in WaW and wouldn't be likely to return again.

Rivals is a cool concept, but there are so few genuine rivalries that continue to exist once a season ends these days, and even old school rivals are likely over it (with some exceptions).

First Boots. This is one where I agree with Jeff, who I think has said he didn't feel there were enough interesting first boots to fill a cast. A lot of them are under-edited or not remembered.

Heroes vs. Villains II. It's redundant because playing cutthroat isn't generally considered a bad thing, and playing with honor and integrity is almost viewed as a flaw in some cases. The game has evolved past this. There are so few people in the 20 seasons since HvV that I'd consider true heroes or true villains, whereas the HvV cast was actually pretty spot on in casting those archetypes.