I don't think they'd do anything special, because I don't think there would be a last year. The year after it reopened after renovations, however, it may even have it's own gift shop like all the other rides these days.
But to answer your actual question better, I'm not sure there's a whole lot of precedent here for SDC. The park sometimes will make little nods to its history, but it's actually surprising and unusual how little they do. I honestly think they'd be too focused on hyping a new attraction to do anything to celebrate an old classic. Plus they would be trying to dodge the backlash, which could be huge for one of the big two classics.