We had 2 good Alien films and one that has severely divided people.
Between Resurrection, AvP and Promethearse, the franchise leans heavily towards crap.
Let's be honest, here. The first two films have an awesome creature. If the creature alone was enough to make a good film, we wouldn't have crap sequels. Scott and Cameron caught lightning in a bottle, and told a nicely wrapped up story. Scott tried worldbuilding with Prome"It's just gonna share some DNA with Alien"theus. It was bollocks.
Reboots and remakes and prequels, in this day and age, are nothing more than "HEY! REMEMBER THIS?!?". Every now and again, there are very rare exceptions, but past a certain point, there is a nonexistent line between hope and delusion.