Gen 1: Bulbasaur - Grass
Gen 2: Cyndaquil - Fire
Gen 3: Torchic - Fire
Gen 4: Turtwig - Grass
Gen 5: Oshawott - Water
Gen 6: Froakie - Water
So I've chosen two of each type in the first 6 gens, the next gen will break that.
At the moment Grass is leading but I'll wait until I see their final...
First footage of the last games doesn't really count as it was for the remakes which we already knew everything about anyway from when they first released.
Getting cover legendaries this time around would be significant because it's all new information.