Your tagline

I find it hard to imagine Ridley Scott will be given the chance to carry on with the prequels.

Hollywood is business before it is art.

I can't think of a tagline as Ridley Scott left all the possibilities open. Even for a queen.

One should have the option to delete a post.

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Its hard to say, it depends on If Awakening is the Actual Title and if this has any bearing on the Plot...  Saying that the Covenant Title never had much of a connection to the Movie... apart from their Badges had the Cherubium from the Ark of the Covenant.

But then if we are looking at a Tag Line regardless of the Title, it depends what we can Gauge from the Plot/Set-up.

"A Decade has passed since the USCSS Covenant had departed off to Discover their New Eden, the incoming USCSS Exodus is on route to Origae-6 to expand the Colony and arrive at what they believe would be Earth 2.0 but what Fresh Start to Humanity awaits"

The year is 2115 and the Covenant Ship had arrived about 2.5 years prior, the incoming USCSS Exodus is on its away and expect to arrive at a Colony Setting up a New World/Start, they discover some a Colony, Infrastructure, Wooden Buildings, but a No Sign of the Covenant Ship, despite being in Radio Contact.    

As they arrive they are greeted by at First Glance appear to be a Colony of Humans, dressed in a Pagan Way, it only on close inspection they discover their is something DIFFERENT with these Humans.

It is when they discover Mankind 2.0 and that this Civilization do-not take too kindly to Humanity 1.0 arriving at this New Paradise and NOT deemed worthy.

Hmm...I would punt to Hal Douglas if he was around. Something like- "In a WORLD of human struggle pitted against interstellar and corporate interests, an unassuming woman.....BUM BUM BUM BUM.....would be tested....BUM BUM BUM BUM....within an inch....BUM BUM....of.....BUM ....her............life...............BUM BUM BUM.....and the life of her cat"

Well, here is a better example LOL! 

https://www.youtube.com/watch?v=1bcKFrHFS64