I'd be surprised. At least the not need to show a ticket deal. It'll be too easy to uber to the front entrance under the guise of checking in, and work your way to the park entrance. If you have to show your hotel key, that's about the same as showing your ticket.
But in reality, they are going to want to sell rooms to convention goers. They aren't going to force those to buy a ticket. And if it's just included in the price, this thing is going to be $500 a night, which I just don't see.