Ok so time for another one of my off the wall theories lol. Seeing as how this movie is called the last knight and we are all speculating on if OP or even Megs is this "Last Knight". What if The Last Knight truly is King Arthur? I'll explain. We know we are getting a sunken Ship and it looks like the movies "artifact" of importance will be in that ship and need to be retrieved. Okay great, but who's ship is it? My theory is that the ship belongs to this "Creator" who is rumored to be in the movie and I believe this Creator is a cast off Quintesson who took on the appearance of Merlin to blend in during those times. And I believe this Creator has the Sword (artifact) on his ship that is in the water. However, it may just be that the Creator knew he would one day die and or be found so he had a protector. This protector would come to be known King Arthur. Now this is where my theory gets a bit more complicated. What if King Arthur himself was not human but a TF? The last knight to be more precise. What if this protector of the Creator took on the role of the protector of Camalot and therefore Earth? This Transformer could be in all gold and could be someone like Ultra Magnus or even, sorry to say it again, but ROM the Space Knight lol. There is a myth that King Arthur's burial site was supposedly found and when they found his remains, he was GIANT and his remains looked not of this world. So what if they find his burial site and instead of human remains, they find a buried transformer in stasis? And find out that this Transformer was from the Knights of Cybertron and protecting this cast out Quintisson and his artifact? And while on Earth, he (the Transformer) started a new brotherhood of Knights out of loyal humans that swore to protect their secret?