like i said these are just my speculations and questions regarding the starters. Feel free to correct me or add your input.
now i know we all wont fully know what they look like until Game Freak announces the final forms, but that's the fun of guessing until they do. Is it possible to tell the size of the Pokemon's final form by looking at their starting moves like pound, scratch, and tackle. For example, Ive noticed that through the history that the starter Pokemon with the move tackle mostly had bigger bulkier final evolve forms.