The card would have been better? Hart vs. Austin is one of Wrestlemania's best matches of all time, much better than anything I've seen Hart and Michaels do together.
agree and disagree here. Hart/Austin at Mania 13 is one of the best matches of all time, Mania related or not. it was totally epic on a number of levels and was very influential setting up the Attitude Era with the double switch as Austin turned heel to face and Hart turned face to heel. Austin passing out with blood running down his face is one of the most iconic images in the history of Mania and for sure the career of Stone Cold.
that said, Hart/HBK have put on some clinics of their own. the year prior in fact at Mania 12 in an Iron Man Match. that's also one of the best matches of all time, Mania related or not. and it was HBK's first WHC run as the "boyhood dream" came true. great wrestling with a great story. they fought a couple of times in the few years leading to that match also and were very good. one was the very first ladder match in WWE for the IC Title and it was good. they also fought at Survivor Series, again with Hart holding the title, i think circa 91-92? also an excellent match.
so i wouldn't say that HBK/Hart in a rematch for the title would have sucked or that the entire show would have suffered if the original plan (which i've heard a number of times was for HBK to drop the title back to Hart) did in fact happen.
however, i am glad for the way things turned out long-term...
1. Taker reclaimed the world title after a rip-off first run. he held the title till Summerslam, which was reasonable.
2. Hart/Austin put on a clinic, pulled the double switch, and both did some of the best work of their careers in the following year.
3. Taker/Hart were set up for Summerslam which saw HBK return as the special guest referee. HBK nailed Taker with the chair, costing him the title.
4. due to the events of Summerslam, HBK and Taker began an intense feud that led to the first ever Hell in a Cell match, and on a side note, the debut of Kane.
5. HBK/Hart fought for the world title at Survivor Series in the now infamous Montreal Screw Job.
6. HBK/Taker continued their feud that culminated with a Casket Match at the Royal Rumble. HBK retained as Kane turned on Taker -- meanwhile, Austin won the Rumble Match.
7. Mania 14 sees Taker finally face his brother Kane and defeat him. also, HBK drops the world title to Austin, ushering in the Austin Era and starting the greatest rivalry of all time in Austin/McMahon.
so given the evidence of the events from Mania 13 to Mania 14, you'd have to say that things worked out well. maybe better than originally planned.