But some things are confidential, and I would have to tell you via PM.
But I'd like you to ponder about a few things:
-How exactly are Team Flora going to one step ahead of you? (As in, they take the stone, but you still have to battle them)
-Should the Team Flora Base be in a City and undercover, or be in the outskirts of somewhere?
-How would the rival tie in with all of this?
-Would other legendaries be involved?
I'll give you a basic example of what Team Flora is planning:
They are trying to collect the 7 scattered "Green/Rainbow Shards" from various places. (I haven't decided if they are all green, or are rainbow colored)
And every time they manage to be one step ahead of you. (Maybe)
When they have all the shards, they go to the Ancient Forest to revive the Growth Pokemon.