Operation Scarlet Spear: Update 27.3.8 has passed Cert and will be going live tomorrow, April 9th @ ~ 11:00 AM ET! PS4 does take some time to process the update for launch so it may take a bit longer, but you will be greeted by Red Text to countdown to the update's deploy.
As an early heads up, since this is our first work-from-home console launch, the Operation: Scarlet Spear event itself will begin sometime after the update has deployed. To help address issues quickly if present, we want to give our QA troops hunkered down at home the ability to jump right into the event with the community. Once everyone is in a position to do so on our end, we will launch the Operation. Once it is live we will inform you across the usual Warframe channels and post the dedicated Operation thread with all you need to know to start the collective fight against this new Sentient threat! We're extremely grateful for your patience as we work out the kinks of our new work setup so that we can bring you Operation: Scarlet Spear and more.