although i can understand fans of alien 3 and 4 being upset over a retcon, i am not sure why this is necessary.
alien 3 and 4 are not going anywhere. they exist and will always exist. if they make a new film retconing them then so what? as long as we get a great film then that should be all that matters.
for the record, i do not believe this new alien film will be better then the assembly cut of alien 3. i have come to really appreciate that film. however, if someone wants to make a new film showing an alternate version of ripley, hicks and newts fates then i dont see a problem. we have it in comics in the form of earth war and that was interesting. we have it in the form of what if stories from the unused alien 3 scripts. this time we get to see a new version of what could of happend.
i hate alien 4 with a passion and believe blomkamp will make a better film then that.
no matter what though, this film will not replace your copies of alien 3 and 4 so why cant we just accept that this is happening and wait and see how it turns out.