I was listening to Joe Gagne's Joe Vs. The World 1994 WWF recap podcast and he mentions that the plan was for The Undertaker and Underfaker to team up post-SummerSlam as a tag-team which was of course nixed when they realized the angle was a dud.
Joe read a lot of Observers to prep for the podcast so I assume his source for this was Meltzer, but have you ever heard that this was the plan?
I don't specifically remember that one, but it sounds like something they'd do. Brian Lee was basically brought in on Undertaker's word anyway.
And man, remind me not to hire Undertaker as a talent scout. He's given us Underfaker, then DOA, and finally Kronik over the years.