Perhaps, as we don't publicly have the additional contracts that detail specific characters.
But, just to be clear, the contract details regarding "families" is not what characters Universal has rights to, but what characters are prohibited from other parks. That is what the section of the publicly released contract indicates. It is clear that Iron Man, Thor, Black Panther, etc. are not allowed to be used East of the Mississippi at any other theme park. What is not clear - because the public contact doesn't indicate one way or the other - is whether Universal has the right to use those characters either or if basically not one can.
Edit: they can certainly use those characters for incidental use like murals. But that doesn't mean they have the rights to other characters for use in attractions or M&Gs.