I think we were extremely close to the right one a few days ago. The following is mostly the same as Nev’s last post just with those minor adjustments I suggested:

EPISODE VII
THE FORCE AWAKENS

It is a time of despair.
Luke Skywalker, striving
to reforge the legendary
Jedi Order, has vanished.

Emboldened by the Jedi’s
absence, agents of the
evil FIRST ORDER have
risen from the shadows
of an Imperial fortress
and claimed supremacy
over every world beyond
the fragile New Republic.

Desperate to unite these
planets in RESISTANCE,
a fearless militia loyal
to the New Republic has
sent its pilots in search of
the last Jedi, seeking to
restore the light of hope
to the darkening stars….

Anthony, to your point about Luke clearly not embodying that hope anymore, that’s something you can easily say with hindsight. After seeing TFA people had a million reasons why Luke might have vanished. And besides, even if he doesn’t represent that hope at the beginning of TLJ, the whole point of that film is to see him get there. So in my opinion it’s integral to firmly set that expectation of him, have it shattered, and then restored in the conclusion of TLJ.