Maybe make it at the place where you get to see Epona, you know, the spring.
There you will be able to lift objects (stones, optional ofc), battle a few enemies, roll into the gate to test objects, maybe even talk with the girl? Hopefully be able to crawl in the hole, but i guess that wont be in
, walk in water, and have a look at epona.
Thats more then i expect for a first preview so if you have all that, it would be awesome