CDPR released their break down of what the company is working on that you can see below. Phantom Liberty has had the most staff of CDPR since last December as the core CP 2077 staff continues to contract as the base game needs less and less attention as most all critical issues are patched up and all versions are in good shape. Interesting that the 2nd biggest group of people was working on Project Polaris aka Witcher 4. I would surmise some of the "other projects" is the pre-production for Project Orion.

On yesterdays Twitch stream Lead Quest Designer Paweł Sasko stated while he was in Boston for about a week scouting apartments and doing some preliminary work on the new Boston studio he and the majority of the team will not relocate until the expansion for 2077, Phantom Liberty, ships. So I wouldn't expect to really see this chart list Project Orion in detail until after that happens. You can see the chart below;