Scott,
Was the plan always to turn Rick Martel heel upon his return in 1989 following his time off? When he came back he was in full babyface mode for several months, though he was in singles action instead of going back to teaming with Santana. Was this simply to bide time until they knew what direction to go with him? Or was the plan all along for him to turn on Tito?
Oh yeah, pretty sure they wanted to have him as a singles heel for a while before the turn, and Wrestlemania was just the optimal place to do it.