Right now we're on a Family Day, so the whole gang's got their parents, siblings, and guardians running around causing general mayhem. A good place to start catching up would probably be near the end of the missions (brewing storm was fucking Namek and deserves to be tackled on its own time), because that'll bring us right into most current events as well as giving a good view on where everyone is at, mentally, right now.

I'll find a good starting point in a second, phoneposting is terrible.