It seems like we will have an unsettling overlapping in events this June. Normally I wouldn’t find it problematic but since the launch of Atlantis Rises, as players, we have to prepare for events that demand high usage of World Energy.
Assuming the calendar for Sand Empire and Atlantis follow their current pattern, they will overlap on the last week of the the month. It would be really unfortunate to neglect the Sand Empire missions during the time Atlantis Rises comes up.
My suggestion would be to anticipate Atlantis (06/20-06/23) and let the Summer Event start on June 24