That's an amazing looking park.
However, as this park concept was obviously done some years ago in agreement or at the request of Marvel Inc AND considering that Disney now owns Marvel chances are that this park concept was in the "the pack" of the Disney-Marvel deal. In this case it would mean that what you saw today in this article might be, with a bit of luck, the concept which will serve as inspiration - or at least part of it - for DLP third park!
No. All creative development on the proposed theme park still belongs to the developer Tatweer, not Marvel or Disney. And while the park in Dubai is currently on hold, it could still be built some day.