Rare as always remains very discreet but they give clues through interviews, artworks, podcasts and I gave myself enough trouble to try to gather all that so there can be real but also speculation.
already it is important to take into account the trailer
In the description of the video we can read that it is indeed asets and possibility in the game. It is important for the future because many elements are in this trailer.
We will start by analyzing the artwork of the game
we will go directly to the most interesting.
The developers have talked about a damage system much more than just holes in the hull with mast tests that collapse on Unity prototypes and they illustrate it here
On this Artwork we can see a lot of things, actually we see the mast about to give way, we also see fire on the bridge (we can imagine that it will be necessary to extinguish it with buckets of water). right we see a pirate grabbing a rope that has been severed (can we use it as in the movies while swaying it could make duels more aerial) We also see a cat and on the other side a parrot were pets (will they be useful afterwards? we do not know yet) Let's go on the left side now, there are holes in the sails, we also see one end of the stairs that serves to climb the Captain's bar bursting (if this element breaks you could imagine not being able to climb to direct the ship) Fun thing we see an old gold-hungry sea wolf dive in the middle of sharks for a few pieces the problem is that the scale is sectioned and he can not go back up. R.I.P, the Skull-shaped Cloud has already been shown by Rare. You can also see a sword with a skin a little more fanciful, mysterious a sword Ghostly?
On the Table we can see a bonus hunting contract with the name of a crew marked on it, Sea Of Thieves apparently is not only piracy (but we will come back later) we also see the famous long view that everything Respectable hater must own. (The famous long view that posed a lot of problem to the programming team because it broke the code of the display distance of the game so they had to load the resources faster but they already use a lot of resources in the game So I guess they finally managed to integrate it. What else do we see ... a violin and a banjo! yes there will be so many good and other musical instruments, we have no more precision on the subject, if we can create our take song, learn sheet music or others. And the last thing are the dice to play of course! There will be mini games such as decoys or cards (poker?) With bets to become addict haha.
Well, here it will be fast but it's a detail that I find cool developers have confirmed that we can smoke a pipe!
http://image.noelshack.com/fichiers/2017/48/6/1512243112-capturevbgf.png
Here a question about fishing has been asked and the answer is more than convincing.
Rare takes as an example to have learned during his visits to the Cutty Sark (Greenwich) and Golden Hind (London) that rats climbed directly on the upper decks when the ship began to take water. In fact, the mechanics have been integrated into the game and if your team in the open starts to see rats spinning between their legs, you will know that there is a problem.
Another small artwork to analyze
here we can see that the pirates were attacked by the Kraken and they preferred to flee and survive by offering the boat to the Kraken (the tradition is that the Captain dark with the ship alas) For Rare escape is also an aspect of Sea of Thieves the Kraken will be a formidable enemy and other monsters will also be in the game like the snake of the seas and it will be better to ally with other pirates to have a chance to defeat them.
speaking of monsters we can also talk about sirens, there will be several types of mermaids, friendly sirens, sirens in a more original style and more frightening sirens (we do not know if it will be states of transformations or types) sirens ... but we have a gif that illustrates the thing.
https://thumbs.gfycat.com/ImpracticalValuableAmericanindianhorse-size_restricted.gif
to stay a bit in the bestiary until now in Alpha Tech / Beta except players, skeletons and sharks we have no real threats but in the game there will of course ghosts
https://thumbs.gfycat.com/EnlightenedForsakenCat-size_restricted.gif
there will also be skeleton lords and different types of skeletons
http://image.noelshack.com/fichiers/2018/09/1/1519661528-6an9f355asf01.jpg
http://image.noelshack.com/fichiers/2018/09/1/1519661587-sea-of-thieves-artbook-12.jpg
https://thumbs.gfycat.com/CostlyUnfitFinch-size_restricted.gif
And this pirate presented on the stand at the E3 who is she? she does not seem dead like a ghost and at the same time she is not alive ... would she be Cursed? the future will tell us.
Rare we wanted to opt for an original screen system, There is a feature in Sea of Thieves: the paintings. It's a bit like the photo mode of the game, in which we can create a painting in gold frame of what we have on the screen, and even better: to make a physical object that will be transported in the Yes, we can hang his painting in the captain's cabin so we can remember what we did there were 50 trips and tell our memories to the crew.
that's what I gathered and the paintings on the islands show a lot of things like the Kraken, Giant Snake, Giant Crab, Wild Boar, Turtles, Bears, Frogs, Birds, Lizard, Stingray, Tribals, Fishing, Arrows, Spears etc. ...
sorry for my English ^^