I'm pretty sure that Ridley Scott couldn't f*ck the series up as that is done by that guy who's name I don't remember, but who was the director of Resurrection.
Actually I'd rather see the Alien movies end where they are. I think that the Resurrection was a total failure and mistake, since Ripley herself is more alien than the greenhorn cargo ship crew member ...
I'd more like to see for example the life and the struggle for surviving on the colonized planet before in Aliens the troopers came. That would give a fresh look on the events, plus there won't be any oldschool characters (including Ripley). You know .. like a view from another angle what was happening on the planet.
Basically - if it's not like view of another angle without Ripley and others, then I'd rather see the Aliens franchise die with the disappointing Resurrection as the final nail in the Alien coffin.