Megaladon Shark - Alternative to The Kraken

I was thinking the Kraken is cool and all (tho they NEED to make a body for it and give some kind of loot for killing it. But wouldn't it be cool to have other large threats that appear at random in the game. I was thinking one could be a Megaladon Shark - I mean sharks in this game can already be kinda frightening at times when they r chasing u, can u imagine a Megaladon Shark (GIANT shark) appearing and starting to attack the ship or chase after your crew in the water, DAMN that sh*t would be EPIC! - Please Rare make this happen!