Introduction
These packs with the Spring 2022 Test Realm (), though they weren't known as "World Packs" and rather just modified dropped gear from (you guessed it) ().
The first instance of "World Packs" outside of would come from WizDevs, who asked players regarding
So, in-short, these packs contain dropped gear from the end-world of those bosses
(i.e Morganthe), though the gear has been modified. They're 599c a pop.
Dragonspyre World Pack
There's not much to say, it's just a new set of gear (named after existing gear) that drops from Malistaire and other various end-world bosses.
The existing gear isn't modified, and the world pack costs 599c.
Khrysalis World Pack
Again, not much to say here. This gear *did* kick up a fuss on test realm, because people thought it would replace existing gear (namely the amulets) - it didn't.
This gear is also Level 100+
Lemuria World Pack
This was the big one. In contrast to the other two, this new gear actually replaced the old Merciless. Again, this would only be found in the test vendor at the start of test realm.
A lot were unhappy that the gear they farmed for was being replaced. Though, many celebrated the buffs, including the new Storm boots.
Sources / Timeline
Sun, May 8th 2022: We don't have an exact time these went into the Crown Shop, but they were in by this date. Still awaiting the official announcement.