-1 First, many events are either too long and will make the event not friendly, for example I dont want a that long Halloween event, max 1 month is the best.
2nd) I think we cant predict some issue. Mainly event coming with a client and we dont know what could happens so giving a ETA is not good.
But +1 for the outbreak. Even a little icon will be cool and giving informations about the pokemon you can hunt.