Who says the current thought about the Spino being purely aquatic or as depicted in JP3 is correct? No way to know just from the fossil evidence.
I'm sure that regular land animals get a long flattened tail all the time (
Hypuronector is the only example I know of and it's probably a leaf mimic).
This discussion also already exists, Jens more or less confirmed it won't be Spinosaurus that ever looks like this, the possibility is always around for something related though.
As to what I think the OP was getting at, a giant window for your tanks, it's pretty likely in some capacity given the Mosasaurus show from Jurassic World.
At the very least there'll be some sort of viewing building/outlet for tanks specifically.