RoccondilRinon said:
I was OK with the darkside cave not being explained in the prequels, and it'd take too much editing to work in an explanation. That said, I love the idea of having the twins (or just Luke if ROTJ goes that way) born on Dagobah rather than some random asteroid we've never heard of.

I was convinced before episode 3 came out that we'd see obi-wan and yoda with baby luke in tow chasing/being chased by count dooku at the end of the film landing on dagobah and they'd have a huge fight ending in count dooku being killed in the cave, leaving his evil spirit behind. Yoda would then choose to exile himself there as his force presence would be balanced and cancelled out by dooku's - hence he lives nearby this seemingly random evil cave.

I don't think it would have diminisedh its mystery, rather embellish the reason for it, tie the PT and OT together, make Luke's familiarity with dagobah make sense and give a reason for Yoda to be there. Everyones a winner!

Course then dooku selfishly gets his head cut off right at the start and blows my theory right out the water.