I see. Needing to go all the way to planetary invasion, really takes the steam out of that wonder.   I think the wonder should bypass the need for it.  After all, according to the notes in the last post by (was it frogboy?), it was supposed to allow you to invade early, and I don't really see that with still needing to tech all the way down.

You can get 3 transports with your Third perk on the top line of Malevolent. Will take about 100 points from colonizing and/or events.  

It loaded with 3 Legions. You don't lose the invasion ship in Crusade, so if enemy let their planet undefended or you knock out all their defender, it basically unlimited use until they train legion to defend their planet.