Come on guys.. no fighting. Especially that none of us know the truth about the game, and especially that we all have our own opinions.
Oh, and about the Samurott thing. If anybody even looks at Blastoise, he doesn't look anything like his pre-evolved forms. He looks more like a Bear-Turtle. He has bear like ears, very different features than the previous forms and a very different tale. Then look at Blaziken, while I hate that thing with a passion and I think it looks like a man in a suit (much like Deoxys :G), it's still a good example of how evolution can change a pokemon drastically.
Remoraid is the bullets, Octillery is the gun.
Ampharos is a sheered sheep from a fully woolly sheepy.
Cottonee looks like an old man, and Whimsicott looks like a little wood imp.
And, there are more.
All I know is that I am not disappointed with these Starters and I am excited to see what they'll look like as they evolve.
Blastoise's origin being a mix between turtle and bear? Nah, it's labeled as a shellfish pokemon in the dex, but its inspiration clearly is derived from a large sea turtle/tortoise along with its cannons being taking from the idea of some shellfish being able to use jet propulsion to move by shooting water out of certain internal tubes. However a simpler answer for the cannons would be perhaps a tank and its cannon.