I doubt it will be a double-XP event. I mean, do you spend your Dratini candies for Dratini mass evolution? No! For getting Dnites and powering up.
So that dude could be indicating:
1) We are going to make a rebalance soon;
2) We are going to give candy-discount for power up or evolution;
3) I just say this randomly so I make my gesture cooler
When are we going to give up on the whole "save your candies" thing?
TIA
Answers
My guess is that a gym rebalance is comming soon and with that some movesets changes again.
I would also love a half evolution or power up "cost" but I doubt the half evolution cost will happen now because it will make people complete gen2 dex faster.
Anyway we should get a game update this week, it has been a while since last one, and with that I hope we can know if there is an event coming soon.
In a previous thread, someone mentioned breeding, now that genders are established, with a certain amount of candy needed to generate an egg. I think it's too much to hope for, but would be really cool (unless you had to burn your incubators and km walked on hatching your own mon's eggs). But that would be a way for Niantic to coax real money out of people for extra incubators and guaranteed Blissey or Snorlax hatches.