Kaplan was assigned to lead the development of Project Titan, a highly ambitious massively multiplayer online first-person shooter (MMOFPS). Blizzard had high hopes for the project, but it faced numerous development challenges.

After years of development, Project Titan was ultimately canceled. This was a significant setback for Kaplan and the team, but it also created an opportunity for something new.

Following the cancellation of Project Titan, Kaplan and a smaller team were tasked with creating a new game using some of the assets and ideas from the canceled project. This led to the development of Overwatch, a team-based hero shooter.