Cover legends

are a metal wyrm: steel/poison

And a sleipnir based wooden like horse: steel/grass

The wolf is the 3rd legend and has two forms (steel/fighting and steel/rock)

There's another legendary which is fairy/fighting (kind of a pegasus/unicorn.

There is a minor legendary dragon trio (mastered by another), based on 3 kinds of european dragons: one is Dragon/steel, another Dragon/fairy and a third Dragon/fighting. They're mastered by a Dragon/Ghost.

The giant in the field is indeed like a "mewtwo" and sleeps beneath Galar

There's a mythical (I think they will be 2 more) which is dark/fairy.

That's all I know for now. As you see there are many legends (gen 4 tease maybe?)