No one knows yet, we're all still waiting for an offical announcement, I would suggest checking Elite (PC) on a daily basis, in case they release more ops/challenges without telling everyone
They have already started. There were 2 last weekend, but no more have shown up. Those two did not show up til the day of or the day before they were actually held. So be sure to check often Saturday and Sunday to see. I assume they are trying to put them in slowly to see how well the Elite servers handle and process the two different operations.
YEAH THEY JUST DD THAT 2 SEE HOW ITS GOING 2 BE IT WAS A TEST FOR THE SERVER
DUE TO NEW CHANGES FOR ELITE AND THERE IS ALOT OF CLANS THAT WILL PARTICIPATE
IN IT...BUT FAR AS THAT THERE ARE NO INFO ON THE CHALLENGES