When Miss Fortune readies a unit, can you move that newly readied unit to contest a battlefield during the same action?

Ruling: You cannot move the newly readied unit to contest a battlefield. Showdown starts immediately when Miss Fortune and other units move to contest, so the newly readied unit cannot make another move.

Sequence:

• Move Miss Fortune and other units to a battlefield to contest it
• The unit readied by Miss Fortune's ability becomes ready
• Showdown starts immediately
• The newly readied unit cannot move because Showdown has already begun

Nuances:

• You can move Miss Fortune along with other already-ready units to contest
• The readying effect happens, but timing prevents the readied unit from joining the contest