jamiestarr,
Agree completley with your last post.
Also - I don't think KOTCS will polarize Indy fans.... and to be honest, I don't believe the prequels polarized Star Wars fans i.e. you'll find a new generation of fans will be brought in.
It's funny, but a friend of mine was visting over the weekend and he brought his 10 year old son (Matt). Matt is absolutley Star Wars mad, so I took the oppertunity to ask him some questions e.g. who is your favourite character, what is your favourite Star Wars movie etc. As you would expect, the answers were all prequel based. And it's kids like Matt who will be celebrating the 30th anniversary of TPM and doing the convention circuits in years to come.
Again as far as KOTCS is concerned, as all the main players like Harrison are back, I've got a stong feeling (as long as it's not a complete turkey), that everyone will enjoy the movie to some degree (both fans and general public alike). There is less contentious debate with KOTCS than there ever was with the prequels. And I think even those who are nervy about the alien theme etc. will concede the point if the movie is entertaining. Some people were always going to dislike the prequels regardless.