Prior to using Zwift I used a Computrainer and their software. It had the option of racing a prior performance, real time. It would be fun to have an old-me avatar to ride/race with.
Been suggested a few times, just search something like (they are usually about racing the old blue guys/ghost or something similar). Do a quick search and you should find more than a few, make sure you vote them up so Zwift knows what the users want.
Couldn’t find any similar requests