Paul writes...

Orion is A-52 and then we have two mystery A-designations before J'ann and M'att. Regarding these mystery designations (A-53 and A-54), do they belong to Saturn Girl and Chameleon Boy? I ask because Phantom Girl was given a designation (A-51), so there is a precedent there for Legionnaires being given A-designations. And both Saturn Girl and Chameleon Boy were present at the wedding (though of course they left before the ceremony started), so it's reasonable to think that they might have Zeta'd there.