I've always wondered who Alexandra Moltke would have played in 1897. It's ironic that part of the reason she left the show was because DC wouldn't give her a different character to play, when she might have gotten her wish if she'd stuck it out. (On the other hand, DC might have continued to use Vicki as the time-traveling catalyst in 1897, and she'd have still been Vicki!)
This wasn't my idea, but I've read another fan idea I really liked. What if Moltke had reappeared in 1897 as Amanda Harris? It would have been a continuation of the Peter Bradford/Vicki Winters thing but it could have been pretty romantic. Charles Delaware Tate is the reincarnation of Bradford, obsessed over his lost love and a vision of this girl; he paints her portrait and brings her to life, etc. Could have been pretty neat.