Not sure if this counts, but when Ganondorf was first introduced, he was a far less grandiose, more terrestrial character, which is a more interesting angle to me. People complain that Skyward Sword ruined his character but it was really Ocarina of Time - which is the second game to feature him, even if it's the first where he's onscreen -that started him in that direction.

I've gone on at some length about it in an earlier thread, so I'll just leave it here.

Having a reverse Peach character be a Doronjo-type kicks ass actually

Borderlands being a desert western motif and style with a sense of quiet ambiance to only turn into a game that can't go more than a minute without referencing dated internet humor.

I wish the connections between Ditto and Mew were kept and made more apparent.

The concepts of Erto's gate and seeing the souls of the dead seemed really interesting ideas that were scrapped when FF Versus XIII morphed into FFXV.

Dragon Age, the Architect, and good Darkspawn.

It was ditched once DA2 came out and it obviously never had a chance of showing up in future games.

In SF1, Ryu defeated & scarred Sagat w/ a DP, plain and simple.

After Alpha, they retconned it so that Ryu had essentially lost, went Satsui, and scarred Sagat w/ a sucker-punch Metsu DP. As a Ryu stan I was like ಠ_ಠ at the time lol. But it was for the best as it was part of the arc to give him some semblance of character development. He's in a p good place in 6.

In Mass effect, the original explanation for the reapers doing what they did was that they kept resetting the galactic civilization in the hopes of finding one species that was sufficiently powerful in biotics enough, so that they could use them to somehow reverse the entropy of the universe.

Which to me is more interesting than what we got in ME3

The friendship/rivalry scale in Dragon Age 2 is had so much potential and I'm bummed they went back to just approval/disapproval in Inquisition.

Fire Emblem 3 (and the FE1 remake within it) had generic enemy male Pegasus Knights, but lore of later games completely denied their existence and they were removed in the later DS remakes.

Fates technically brought back male Pegasus Knights, and even had one playable for the first time, but it was made clear it was an exception (They were riding "Tenma" not "Pegasi", and the name of the basic class is Sky Knight).

I honestly don't understand why KT keeps running away from Hyrule Warrior's combat system in efforts to try and do "Something else". The gigantic step backwards the combat system went through in AOC was just...bizarre.

I don't want to mention the exact entries but there's time tourists in Shin Megami Tensei very briefly, and like, I desperately wish they did more with that.