Not a literal “lock everybody’s crosshair on me”, but an ability that “strongly encourages” the enemy team to attack (in the same way a D.Va bomb makes everyone run away).
For example: if Orisa’s supercharger did nothing when first deployed, but after 15 seconds nano-boosted all nearby teammates. Ulting would “taunt” the enemy team into attacking to try and destroy the supercharger, or else they would get wiped out 15 seconds later.
An effective taunt would be a great way to break stale comps like double-barrier or pirate ship.