Most of them did jump to 343

Only a handful went to 343

Interviewer: So, what sort of percentage of the old Bungie team came across to 343 to work on the franchise?

O'Connor: 343 is almost entirely non-Bungie people. There's a few of us, but the vast majority of the team is new and from other AAA franchises around the world. It's a big team, 250-300 people, but very few are ex-Bungie people.