I don’t agree that d2 doesn’t have endgame content.
It’s entire droprate formula was designed for endgame.
One in several million chance to find items? Yea, the game was designed to be beaten fast, grind endgame for loot.
As someone who has never played PvP in D2 and doesn’t intend to, I still find there is plenty of “endgame” stuff to keep me interested.
Correct! There is plenty of end game content:
Baal Runs
Chaos(Diablo) Runs
Meph Runs
Duriel Runs
Andy Runs(these first ^5 bosses drop Essences for creating Token of Absolution for Respec)
Countess Runs
Trav Runs
Pit Runs
Mausoleum Runs
Cow Runs
Maggot Lair Level 3 Runs
Ancient Tunnels Runs
Sewers Level 2 Runs(Act 3)
Forgotten Temple Runs
Ruined Fane Runs
Disused Reliquary Runs
Lower Kurast Runs
Shenk Runs
Eldritch Runs
Pindleskin Runs
Nihlathak Runs
Key Runs(Countess, Summoner, Nihlathak)
Uber Runs(Uber Andariel, Uber Duriel, Uber Izual)
Uber Tristram(Uber Mephisto, Uber Diablo, Uber Baal)
Speed Runs
Diablo Clone
Complete all quests in Normal, Nightmare, and Hell
Kill all monsters in game(Act 1 to Act 5)
Collect/make all items in game(Normal items, Exceptional items, Elite items, Socketed items, Gems, Runes, Runewords, Set items, Unique items - Rings, Amulets, Charms, Jewels, Circlets, All Class-Specific items, Normal Exceptional Elite Unique Armors and Weapons)
Create 1 of every character build
Level to 99
Leveling services(rushing)
PvP(Player vs. Player)
LLD(Low Level Dueling)
PK(Player Killing)
Gambling
Mods
Etc.(there are other fun/creative ways to play the game as well. Treasure hunting, Iron Man games, etc.)
I’m sure there are even more ways to play the game because sometimes you gotta be creative! 
dclone as always… most fun fight in the game… anni is just icing… the fight is what make it fun
I know it has nothing to do with the subject but “PvP Arenas” is a MUST.
I would love to watch OP players fighting against each other imagine Dbrunski vs Llama in arena.
And apparently it was meant to be in the game.
No youre right… After you have beaten the game 1000 times over the past 20 years, with every character, every difficulty, you auto pilot alot of it, skip alot of it because you know exactly what to do.
Now the reason I love D2 so much, is no matter what every time you play the game through, even if the strategy is exactly the same every time, the drops are different, some will allow you to kick butt faster or force a bit more grind as you go.
wtf. THAT is for you endgame content? okay… Most of this stuff are standard in many arpgs…
lvl90+ single player HC character. Never done it
As I posted previously this is what I will mainly be doing. Baal Runs, and MF runs in 85+ areas! Probably other areas, too, that are lower than 85 for items as well. The big list above is some of the content to do in D2. I’m sure there are other content/creative ways of playing D2! 
My endgame is crafting
Chaos and PvP for sure!
same like the old day pk and pvp
How will Uber Diablo proc without duplication of SOJs? I feel it was used as an attempt to clean up the duped item market, making the original process extremely difficult due to drop rate.
Having an end game system where you craft portals using a selection of hard to find/grind items would be amazing. Similar to the Cow Level.
Don’t get me wrong, I can run bosses non-stop and have a blast. But having the option to summon end game portals would be amazing. Especially with randomly rolled modifiers that offer the chance to add MF, or something on the other side of the spectrum such as enemy density, res, extra health, debuffs , buffs.
For users that put a thousands of hours into D2, having an alternate option for end game would keep the player based hooked.
But then again… you’re adding content to a remaster. I think it would hook OG players that have been stuck in the constant mf / baal exp run loop.
The 9 circles of Hell
Each type you beat a hell circle you unlock the next which is +2lvl to areas and monsters
In the end, on the final circle, all areas are at least 85 and bosses like Diablo are as strong as Uber diablo
Yeah the first few Hell Mephisto runs - those are so fun.
I plan to gert my sorc ready and then probably build a pvp necro. I want to do it all, I guess: exp runs, mf, pvp, loots-trading.
Holy grail ! 
(yea in the end it’s a mix of everything to complete it xD)
I would like to add some more though to the list , like cows , especially since now we can kill the king
there’s also pvp , helping every players on sight in normal mode etc…