[Update #2]: Wrath of the Lich King Classic, the very peak of the original WoW era, has now been unleashed.
[Update]: It looks like the rumors were true - World of Warcraft: Dragonflight will be launching on November 28th, 2022!
Wrath of the Lich King Classic's pre-patch has recently arrived, bringing with it a variety of nostalgic events like the zombie plague and the scourge invasion to mess around with. More importantly, the pre-patch has given players the ability to level up their Death Knights so they're instantly ready to venture into Northrend as soon as Wrath of the Lich King Classic's doors open on September 26th.
As a little bonus, and as a way to draw in 'retail' era players, Blizzard has announced that anyone who completes the Death Knight starting experience in WoW Classic will be granted a Frostbrood Proto-Wyrm to use in Shadowlands and the upcoming Dragonflight expansion. Just to reiterate, this means that the fancy new dragon will not be available in Wrath of the Lich King Classic as it simply wasn't a part of it originally.
What the Frostbrood Proto-Wyrm looks like in action, that you can get a little bit of a sneak peek at through the recently posted preview. Have a gander:
The whole Death Knight starter zone can be completed in a couple of hours, even if you take your time, so if you're curious I'd heartily recommend giving it a try. After all, Wrath of the Lich King is widely considered to be the peak of World of Warcraft's Classic era, and getting to play it while there's hundreds of other excited players running around is a once-in-a-lifetime kind of event, so this really is the perfect time to dip your toes and see what all the fuss is about.
You can learn more about the Wrath of the Lich King Classic pre-patch, as well as its future updates, over at the official website. Have fun!