What's the news if any on the Pac/B1G/ACC thing? It sounded to me like a large nothing.
Well, the B1G already announced conference schedules through 2025 back in 2018. Not sure how far out the ACC or PAC have their conference schedules in ink...
In order to make annual games against PAC and ACC teams viable, the conference would pretty much have to go back to an 8-game conference schedule, but I'm sure trying to determine who gets dropped to have 6 division games and 2 crossovers is difficult, especially if you maintain 4 home, 4 away games. Especially if you're trying to align it with teams to have open dates across two additional conferences, AND want to ensure that each B1G team gets one home and one away across those two conferences each year. Oh, and the PAC just happens to have two less teams than either the B1G or ACC, so you need to figure out which B1G/ACC teams will get one less cross-conference matchup that year.
Then, several teams may already have OOC lined up through then as well. Some of this might align; i.e. if a team has a H&H with an ACC or PAC team already, then great! Job done! But if not, you have to look at the extent to which teams are willing and able to break those contracts.
My guess is they're looking at the viability of when they could actually start going to 8-game conference schedules and locking down two OOC B1G/PAC/ACC matchups per year. It's possible that they're doing this all in the background and can announce that it'll commence before 2025, but it's possible that the teams themselves want to hold off until then.
