Alien 5 is still being rumored and since AVP:R came out in 2007, we won't see Alien 5 for a few years if at all. The three people we know who will no doubt be involved in Alien 5, Signourney
Weaver, Ridley Scott and James Cameron have all said they want to be in and want to do
Alien 5. The problem is that Fox does not want to do it and are too busy
with the Aliens Vs Predator series.
It has come to speculation that Fox has maybe thought of working on Alien 5 and possibly a prologue/prequal but it isn't certain as the whole entire idea has been stretched with the four movies. Now, I loved the whole entire series (except for Alien 3), and the idea of an Alien 5 wouldn't be original unless it has flips and turns from the other one like Ripleys DNA is destroyed and the clone is gone after 100 years. Because of that the new protagonist is some old fat %#!^ in a ripped up jumpsuit. But anyways, because of the AvP franchise, there probably isn't going to be an Alien 5 for quite some time, if at all.
This may not be news or may be old news but there have been several rumors of Alien 5 coming around and I wanted everyone to know.