I know the typing for the final evolutions.

An anonymous tipster has told me details about the typing, and what their final evolutions will look like, but he didn't reveal their names unfortunately.

Quilladins final evo will be Grass/Steel. (Its third form will eventually close up into a pod, and turn into what appears to be a spiked medieval mace.)
Braixens final evo will be Fire/Psychic. (Its third form will turn into a witch/dog combination.)
Frogadiers final evo will be Water/Fighting. (Here's a hint. Search "Brigadier" on the web. There's your clue.)

Go nuts everyone.