https://www.polygon.com/2018/5/7/17328486/destiny-2-warmind-exotics-polaris-lance-worldline-zero

Part of what made Destiny so special was its host of obscure quests and difficult to reach rewards. Each new expansion came with a new gun hidden behind some mystifying secret, almost unreachable without community participation. This was shockingly absent from Destiny 2 and its first expansion, Curse of Osiris. Warmind isn’t even out yet, but players are already hunting screenshots for all sorts of secrets.

From a gear perspective, there are a lot of unanswered questions for players. The item that everyone seems to be looking for is Sleeper Simulant, which seems to returning in the latest expansion. However, there are several other unsolved mysteries lingering inside Warmind.