I think that the "resort" idea is patchy at best given the parks market and the UK weather. For example, the band which used to reside on the ship very rarely make an appearance anymore except for things like Scarefest and even then, only on peak weekends. Outdoor events are all well and good but unless its covered and weather shielded, forget it. Plus there is walking between the hotels etc in bad weather to get the outside venue....
I like the idea of keeping the park open until 7pm to stagger people returning back, though, you may just find everyone heads back just after 7 lol, especially if its a nice summers day.
Whatever bar they may decide to have there will need to fit in with the overall theme , which to me sounds like an outdoor affair, maybe a BBQ/Hog Roast sort of area with a canopy over the to keep off the rain, but like the Courtyard, and with a bar there as well. Couldnt see it being open late into the night though, I think what we may see will be lots of people walking through ATH to get to Splash if they want a late night drinky.