I'd just like to add that Insurrection has a more positive ending than it's more popular older sibling, First Contact. At the end of Insurrection, as you'll remember, the Ba'ku are allowed to live on unmolested and Picard is making plans to get it on with Anij (well, when he has the time to, total player!).
At the end of First Contact, the main characters wave goodbye to all the new friends they've made WHO ARE DEFINITELY DEAD WHEN THEY GET HOME. Worra a buzzkill.
Ah, but we have no idea what the fate of the Ba'ku really is; all we know is that Our Heroes intend to go back to the Federation Council with what they've learned.
The council could say, "Admiral Dougherty was acting with our full authority; WTF were you doing out there?" They could say, "Once you knew the Son'a and Ba'ku were the same people this became an internal matter and you should have withdrawn from the conflict." They could say, "Why didn't anyone ask the Ba'ku if the Son'a could settle on the other side of the planet?". We witness the climax but not the resolution, just like when Voyager arrives at Earth in "Endgame".
But, longer-term...the cat is now out of the bag regarding the Ba'ku planet, and unless Starfleet is going to play protector for a non-Federation world, there's likely to be all kinds of issues with people who hear about the planet seeking it out to settle there, if not try to steal the radiation again.