Regardless of whether he personally liked the addition of jetpacks to the Call of Duty formula, Treyarch studio design director David Vonderhaar isn't keen on bringing them back for a future installment. On Twitter, Vonderhaar replied to a pro-jetpacks fan with a stern, all-caps "NO," adding later that he's still disturbed by the community response to jetpacks in Black Ops 3.
"Such short-term memories," Vonderhaar tweeted. "You hung me from the highest branch. No. NO. I have PTSD."
In May of last year, Kotaku reported that Treyarch was taking the lead on 2020's Call of Duty title, breaking Activision's established cycle of rotating through installments led by Treyarch, Infinity Ward, and Sledgehammer Games. Treyarch's most recent Call of Duty title, Black Ops 4, was released in 2018. 2019's Call of Duty: Modern Warfare reboot was developed by Infinity Ward.
Sledgehammer and Raven Software were originally slated to take the lead on 2020's Call of Duty, which will reportedly be a Cold War-set Black Ops sequel. Treyarch's Black Ops 4 shipped without a single-player story mode, with it having been scrapped late in development and replaced with Call of Duty's first battle royale offering, Blackout. While Blackout was generally well-received, Black Ops 4 was widely criticized for its lack of single-player and an overabundance of microtransactions added post-launch, which prompted a public response from Vonderhaar on the matter.
2020's Call of Duty game will reportedly be a cross-generation title. Treyarch's Black Ops 3, released in 2015, was the most recent cross-generation Call of Duty title—and, unless minds at Treyarch change, it's the studio's last to feature jetpacks. Sorry to all fans of back-mounted personal propulsion devices.