If Pirates was a D-ticket (instead of a mega-E), more intimate and themed to Pandora. That's kind of it in a nutshell.
For people who don't mind youtube videos of foreign attractions, look up the opening Jack Sparrow AA in the attraction, the treasure scene and the Davy Jones Organ scenes. That's pretty much what the ride will be like, it'll be intimate because it won't have the Imax scenes, full sized set pieces like two pirate ships or an explosive battle scene with a kick of thrill at the end.
That's not an insult, this is the supporting attraction. I don't like the Universal trend that everything has to be an E-ticket. They need to have a balanced menu. It's a big problem for Disney when it goes the opposite way of balance and they forget to build any E-ticket at all (looking at you NFL). Fortunately, an E-ticket is literally above and/or next door.
It's another thing to talk about the money they spent on the whole land, but don't confuse 1+ billion dollars with what they actually spent just on the boat attraction. It didn't cost anything in the neighbourhood of Pirates, which I think is in the wheelhouse of RSR for most expensive attraction built.