As A-Kid said, SheiKra was designed with this in mind...
Are floorless coasters really that good? The vast majority label them as average as a whole, and with Griffon it didn't particularly add much...
Oblivion is all about the drop and that's it, it doesn't nor ever will need (or get for that matter, Ropers people) an extension, it's fine and still awesome the way it is now...
It may be the one with the shortest queues nowadays but it's throughput is very high and considering there's nothing but itself drawing people into that area against Air and Rita then it's fine...
In short, this won't happen and I'd rather see money spent on supporting rides right now...