If you want to just auto launch in a round about way, but have those ships sit still, you could set a new rally point, set the planet to it and use the governor to cancel all ships going to that rally point. I'm not sure what that would gain you though.
I used to do this all the time in DL. Mainly because so many ships would get lost on autopilot and just sit next to the planet that produced them. I would do this for 7 or however many turns it took to produce the number of ships that I could put in a single fleet and then I would send each fleet to the rally point by hand. Really painful but at least they got to where they were going in a turn or two.
Now in DA autopilot is more reliable (except of course for the ships that will reach the rally point within a turn after reloading the game) so I no longer have to do this. Of course now it takes *forever* for the ships to actually reach the rally point. It seems I've merely traded one form of pain for another.
Someone tell me that things will be all better in TA.