I think the potential of this feud & match has been VASTLY overrated by the IWC, in my view anyhow.
When I look at Dustin Rhodes & Cody Rhodes, I see two men whose careers are going to be in two very different places when it's all said and done.
Dustin Rhodes, AKA Goldust, hasn't been a relevant factor in the WWE or the WWE roster since the mid 90s. He was a talented guy and did create a unique character for himself. But, the character was never really someone taken seriously and went from being pretty edgy, especially at that time, to being something more cartoonish than anything else. He started out hot but fizzled out after a few years.
Cody Rhodes started out in the WWE as this young, uncharismatic 2nd generation wrestler who spent a few years being little more than a flunky for Randy Orton as part of Legacy. When Legacy split, it was thought by many that Ted DiBiase would be the breakout star. However, over a period of roughly 2 years, Cody Rhodes has gone from an uncharismatic drone to being one of the hottest young heels in wrestling today. He's quite probably been the greatest IC champ of this past decade and if he gets by Big Show at WM, he'll only have to hold the title for 10 more days to have had the longest run with the title since The Rock back in 1997. He's improved dramatically on the mic, he's stepped his game up inside the ring and Rhodes is someone that will probably be a main eventer, maybe even a World Champion, in the not too distant future. To top that off, he's only 27 years of age. He's potentially got his entire career ahead of him, and possibly a brilliant one at that.
What exactly does a feud with Goldust do for Cody Rhodes? As has been said by some, including me, Goldust hasn't been relevant for a decade and a half. On April 1, Goldust will be 10 days shy of his 43rd birthday, the best days of his career are far behind him. If the match did go down and Cody wins, he gains nothing because all he's done is beaten his irrelevant, 15+ year older brother. If Cody lost...well he'd have been beaten by his irrelefant, 15+ year older brother and all that would do is make him look weak and bring his stock down.
Cody Rhodes went over Rey Mysterio at WM last year, a major star in wrestling & multiple time World Champion. The Big Show is also a major star and a multiple time World Champion. Cody's stock was elevated by beating Mysterio and, if he beats Big Show, it'll be elevated even more. Even if Cody does lose to Show at WM, it's not going to hurt him. As I said, when you look at it from all reasonable angles, Rhodes has probably be the best overall IC champion in well over a decade.