I don't see Shockwave being removed for a while. One, because it just recently got a re-paint, two, because it's still running strong, three, you can't fit anything in the space but a wild mouse (which KD already has), and four, it took nearly 15 years after King Kobra's closing for Skyrider to close, so Cedar Fair is not on a TOGO closing rampage.
I honestly think that the ride is not as bad as people claim it is. I've said "ow!" more on Alpengeist than this.