Its fallout from XOS. Various members of Excalibur (and Blob) are mourning the loss of Betsy. Rictor mourning losing Apocalypse. Rogue and Gambit have no sympathy for him though. They all get a call from Rachel to meet them at the Boneyard. X-Factor has concluded that Betsy's death is inconclusive and since they cant confirm it, she cant be resurrected. Rogue is outraged but Rachel tries to reason with her. They need to check out the scene of the crime
Excalibur go to the Braddocks in Avalon and tell them they need to find answers about Betsy. As a a mutant and someone connected to Otherworld, they need Meggan's help. Jamie allows it. He puts on a Sinister cape and goes through a gate and meets with Mr. Sinister demanding a body.
The group is out on a field where Betsy was last and they want to see if she left an imprint. The team holds hands and combine their powers. Jubilee provides lights for the faeries, Rogue is a power conduit, Gambit does something with kinetic energy, Rictor causes the ground to shake and they summon Betsy. The Betsy Corp comes through and they agree top search for 616 Betsy
The final scene is allegedly our girl with Warren