Feud I would've liked to see-
Bret Hart v. Hogan...This feud would've come to fruition, but Hogan left WWF to go to WCW. When Bret joined WCW, it was rumored that a Bret/Hogan feud would come about. A Hart/Hogan feud would've drawn HUGE, but WCW never capitalized on it. Heck, WCW didn't do much with Bret.
Jericho v. Goldberg...This feud would've occurred back in '98. HOWEVER, Kevin Nash influenced the bookers to scrap the idea due to Jericho's size. At the time Jericho was a young, rising star, whose charisma was unmatched (with Ralphus by his side). Jericho was arguably the most entertaining part of a waning Nitro, and a feud with Goldberg would've put him over HUGE. In fact, the initial reaction to the possible feud was tremendous.
Taz v. Steve Austin...This could've been the feud to help the failed Invasion angle. As part of The Alliance, Taz butted heads with Austin (the leader of the group). The reaction to the possible collision between Taz and Austin was incredible, and added great drama to the Alliance stable. At the time, fans still linked Taz to ECW, and wanted to see him get over on Austin. However, the WWF never acted on the possible feud, which had HUGE potential.
Kurt Angle v. Bret Hart...Rumored to take place at WM20, but didn't happen. Being a hart mark, I would've LOVED to see Bret lace up the boots one last time for a 5 star match. Angle would've been the perfect guy to wrestle, and the possible match had the possibility to become an all-time classic.
Thoughts?