If they are going to have a monster / water boat ride, it just would make the most sense for it to be Jaws. As a 40 year old regular(ish) person I had not heard of Creature before this message board, whereas I feel everyone knows Jaws, I have seen the movies and loved the ride - I thought it was amazing and have a lot of nostalgia for it.My kids would love it, there's no other ride like it. It seems Universal is going big on nostalgia at the moment as we have seen in the US parks, and as I'm in the UK I've been following Universal UK stuff closely - people have interpreted the concept art as us getting a Back to the Future rollercoaster, and also a Jaws/ Amity area with the hanging shark which is co-incidentally or not, next to an expansion pad.
I just think a water ride is such a big investment of money and maintenance that Jaws is the only thing that will push them to do it. It's much more well known than Creature, the shark is one of the symbols / icons of Universal studios. Jaws has the massive advantage over Creature of nostalgia. The huge nostalgia draw of bringing back a ride that people have really fond memories of 'remember when you were 5 and screamed the whole way round but then asked to go on it again' etc! I bet every day in Universal people say 'I wish the jaws ride was still here'. Creature doesn't have that. I'm sure a Creature ride would be really good too, I like the sound of the dark indoor rainforest setting, and if we could have both them that's brilliant. I just think the general public would get way more excited over Jaws = more social media hype, more merchandise sales, more ticket sales, more profit.