Shard’s digital form recently got shattered by Sabretooth, so now she’s in the future having a future story that doesn’t matter and isn’t good. It also breaks the momentum of the hunt for Sabretooth that was going on for the preceding issues.
The punchline is that MORE of the alternate future timeline characters end up in the 616 present day when Shard returns and brings them with her. They’re the Xavier’s Underground Enforcers…
Shard leaves X-Factor to go hunt for them, so they don’t screw up the timeline.