In Star Trek: Picard season 1, episode 8, "Broken Pieces", Seven of Nine arrives to help Elnor defend the Artifact from Romulan Zhat Vash conspirator Narissa (Peyton List), who has already murdered too many xBs (reclaimed former Borg drones), including Hugh. Within the Queencell, Seven discovers that the Cube is still home to thousands of drones in stasis. If the drones are reactivated, that will turn the tide of the battle against Narissa, but there's a catch: reactivating the drones means re-assimilating them into a "mini-Collective" — and that Collective needs a Borg Queen.
Star Trek: Picard Season 1 Hinted Seven Of Nine Would Become The Borg Queen
Seven Of Nine Temporarily Becomes Queen Of The Artifact's Mini Borg Collective
In Star Trek: Picard season 1, Seven of Nine becomes a temporary Borg Queen of the Artifact's mini-Collective by allowing herself to be assimilated in the Artifact's Queencell. After Seven of Nine struggled to reclaim her humanity in Star Trek: Voyager, Seven is loath to assimilate anyone ever again, but becoming their Queen is the only way to reactivate the drones in stasis. Even though Elnor assures Seven that the reactivated drones can be reclaimed as new xBs, Seven worries they won't want to leave their new Collective, and Seven won't want to let them.
After everything Seven of Nine went through in Star Trek, Seven potentially becoming the Borg Queen seems plausible. Seven was originally singled out to speak for the Borg in Star Trek: Voyager season 4, episode 1, "Scorpion, Part 2". Voyager's Borg Queen (Susanna Thompson) tried to court Seven back to the Collective in Voyager's season 5 2-part episode, "Dark Frontier". Voyager's Borg Queen could have been grooming Seven of Nine to succeed her, even then. But in Star Trek: Picard, the Collective ominously says, "Annika still has work to do", suggesting Seven isn't ready to be Queen yet.
Dr. Agnes Jurati Became The Borg Queen In Star Trek: Picard Season 2
Agnes Jurati And The Borg Queen Chose Each Other
Cyberneticist Dr. Agnes Jurati (Alison Pill) becomes the new Borg Queen in Star Trek: Picard season 2 when Jurati merges with the Borg Queen (Annie Wersching) from the alternate Confederation of Earth timeline. La Sirena's crew rescues that universe's Borg Queen—the last of her kind—from being murdered by a xenophobic version of humanity, and uses her computational power to travel to 2024 and save the Star Trek timeline. In the 21st century, the Borg Queen tries to rebuild her Collective by seducing Jurati with promises of euphoria and belonging; the Collective has no secrets, boundaries, or rejection.
To Agnes Jurati, the Borg Queen's offer is compelling. Jurati became part of La Sirena's crew because she had nowhere else to go after murdering her mentor, Dr. Bruce Maddox (John Ales), on orders from Romulan operative Commodore Oh (Tamlyn Tomita). Even though Agnes makes friends on La Sirena, Jurati feels her bad track record keeps her from forming the connections she genuinely yearns for. For a while, Agnes relishes the power that comes with assimilation, but Jurati eventually convinces the Borg Queen to truly merge into a new being, ultimately creating a new Borg Collective.