The NBA's proposed "3-2-1" draft lottery reform drives the 66.5% implied probability for a rules change. League officials presented the plan to general managers in late April, expanding the lottery from 14 to 16 teams while flattening odds across tiers and adding a relegation zone that penalizes the three worst records with fewer balls for the top pick. Commissioner Adam Silver publicly confirmed the framework, including league authority to adjust outcomes in clear tanking cases, ahead of the Board of Governors vote scheduled for late May. Trader consensus reflects this momentum toward implementation for the 2027 draft, though final owner approval remains the decisive step that could still shift probabilities if adjustments or delays arise.