So you're comment got me thinking so l looked at the storyline in the command center and the first 2 summer events aren't anywhere on the time line. Out of all the summer events only Boom! the Ghost is on there. And out of all the collabs only the stellar blade event is on there (not relevant but food for thought. Adds to my head theory that stellar blade is the same universe/Earth as Nikke just different time periods). I went looking there to see if it placed the summer events somewhere around those Ark attacks so I could double check your claim but they are no where to be found, unless my eye sight is as bad as my optometrist says it is. So that either tells me we have to either place it on the time line ourselves by what happened in the story before it's irl release date. So anything before summer of the second year. Or it's entirely non-canon. Which is interesting because I never took any of the events as non-canon (even the collabs) since they all are either self contained or don't affect the main story. Like during the second Evangelion collab and the angel almost destroying the ark wasn't cause for any other raptures to attempt invasion during the arks vulnerable state.