Don't worry, there will be more opportunities to be disappointed... because that's my secret captain: I'm always disappointing... I mean, what?
a reason why this is false information:
YOU ARE WORKING ON THE PROJECT!
as far as I recall, all of you won't spill any information on gym-leader/E4/Champ typing and their order of appearence...
Therefore you are deliberately going against your own rules, which would imply insider information at first, but that would propably mean that you would suffer consequences from doing so.
But since this is a great and ambitious project for all of you, and none of you want that this project fails (since you are working so hard on it), the best thing to do, would be spreading false information, therefore not spoilering anything and that way not suffer consequences!
Therefore I deduct that Gale being the Grass-Leader (if there is/will be a Grass-Leader) is just false!
CASE CLOSED!
*drops mic*