I'd be delighted with a Jurassic World land which is very similar to what they already have in Beijing, which looks awesome from what I've seen on YouTube. For me that's the highlight of what was presented in the concept art. The chances of me visiting Universal in China are so slim that a clone Jurassic land will effectively be brand new to me, as I suspect it will be for most visitors to Bedford, so I don't worry too much about cloning of that land.
Looking around the concept art, if it is a very tall BTTF coaster that will be unique to Bedford, but I'm not especially motivated by coasters whose claim to fame is they beat height or speed records, so I'm left with a resounding "meh" at what might be a return to Hill Valley. What I really, really want to see is a unique and class-leading dark ride. Something with makes Potter's Forbidden Journey or Monster's Unchained look a little bit second class. Something which makes the theme park online world come to Bedford on opening day. Universal Creative Unchained. Maybe the oddly unspecified top righthand corner of the concept art will be an opportunity for something which tops everything that Universal has done so far. A unique land, with a best in the world dark ride. Then my slight feelings of being underwhelmed will soon fade.
I agree with this re: BTTF. Lots of focus here on potential height and speed, which are great, but a Merlin mindset, frankly. I think the ride needs to have dark ride scenes to justify the theme, right? Like, a pterodactyl roller coaster in the Jurassic Park area - as part of a comprehensive offering with a world class dark ride - doesn't need to be much more than a coaster with an interesting queue. The land already offers so much that a coaster is a great compliment. That fits.
However, if you're getting in Doc's Delorean, you're
going somewhere. If you're going up a spike at 88mph, you've just
travelled in time. That action
means something. If you load in a 1955 Hill Valley (say it's an indoor loading area set at night, during the thunderstorm... we can dream), then after that spike you'd expect to arrive
somewhere/sometime else, hopefully in a big dark ride scene after coasting around outside, like an 1885/2015 Hill Valley. Cue some Biff shenanigans while the track switches etc., and it's time to launch off again, zoom around outside travelling through time, and head back to where you started. You exit back out into the 1955 hill valley land and continue your day in the park. That's the sort of storytelling that would make this an unmissable attraction. The technicals of the Hollywood Drift system, the grandeur of the rollercoaster track and design itself - all work to serve a fantastic story. That's really what we're after. It should be a spectacle.
Otherwise why go up to 88mph (presumably)? Why get in the delorean at all? It'd be totally meaningless. Might as well make it a stand-up-coaster painted like the hoverboard. Cute, fun, maybe. I'd never travel halfway across the world for that, though.