Arknights Global has at last announced the schedule for the next event, Vigilo. Vigilo is a short story collection event that revolves around the Doctor, and is pretty much meant for Arknights lore enthusiasts.
The event will run 17 February 2022, 10:00 UTC – 7 to 27 February 2022, 03:59 UTC – 7. There will be event stages, and the event currency will also be available from all stages except Annihilation or Extreme Mode stages.
The event shop is also fairly bare, with a D32 steel and some Oriron Block to exchange, as well as the Wasteland Walker skin for Provence.
Outside of that, the event following this is likely to be Contingency Contract #6: Wild Scales, set for late February. The Japanese account says early March, but whatever the case, just get ready for that.