Admit it, Wrynn is too shortsighted to connect that many dots.

In all seriousness, even if the Wrathgate didn't happen, I don't see Sylvanas wanting to join the Alliance even if it was possible. She's a former Blood Elf. I think the Blood Elves and Forsaken are intertwined enough at this point that both would jump ship together if it wasn't for the fact that both play off each others' prejudice and prevent the other from seriously considering it.

As for DKs, while I see the connection you are trying to make, it's not quite the same. DKs are loyal to their former race first and the brotherhood of the Ebon Blade second. As soon as they were free they ran and asked for forgiveness and admittance. DKs of opposite factions do fight each other. Now if the DKs had chose to make a nation and unified the way the Forsaken did as a race and nation and not just a class, then I could see your point more. They may both be undead, but their identity is completely different.

Well, the Forsaken are all former elves and humans. The lack of loyalty to that race is because they think they're seen as monsters. Yet the DKs were accepted.

If I'm to understand the article, Sylvanas brought the Forsaken into the Horde because she felt there'd be no way the Alliance would ever accept them. The Blood Elves joined because Sylvanas brought them in. From a lore perspective, it would make some sense for these groups to rejoin their former allegiances. (The only road bump there would be the Draenei; they probably wouldn't take kindly to the presence of the Blood Elves).

The major point to all this was the acceptance of the DKs. If the Alliance can accept them, why not the Forsaken? I mean, I know why not since the Wrathgate, but . . . still.

It was glossed over in the article, but the "remnant human forces" that the article mentions were actually members of the Alliance under Grand Marshal Garithos. Putting aside that Garithos was a racist douche, Sylvanas entered into an agreement with him that she would help him retake Capital City and then turn it over to him...though she admitted to Varimathras that she had no intention of keeping that promise. After the city was retaken, she had Garithos and his men killed and fed them to ghouls.

So, ya'know, betrayal and murder...Sylvanas kinda picked a fight with the Alliance as one of her first official acts as despot of the Forsaken.

The Death Knights came in peace, with the endorsement of Tirion and the Argent Dawn.

The Forsaken came in deceit, with a goddamn Dreadlord supporting them.

A fair bit of difference there.