The event type has been labeled as an Arduous Legendary by CG in the monthly calendar. The start date is still TBD.
2019-04-27 01:23 pm Carrie has confirmed that Separatist Droids are not required but it will be easier with them.
2019-04-24 07:13 pm New Legendary event announced, "Aggressive Negotiations" with Padmé Amidala as the reward. The event requirers a squad of Separatists - any 5 Separatists should work however it'll probably be easiest with the latest. The event is described as "arduous" in difficulty. This event is likely to start a week from now.