I like the "200 yeares since Picard" idea. But, the twist is than Picard is still the captain! They uploaded his brain patterns into Data, who now lives as aSpock/Bones hybrid of two personalities.
See, we already have the first episode down. Something terrible happens to Picard, and he's on the verge of death. Data struggles with the realization that he can't feel any emotions regarding this, and at the end he merges Picard's brain with his, thus saving Picard, and at the same time understands emotions.
Side plot: Wesley falls into an Agony Booth. Nobody helps.