Today I was thinking of a Romulan Demo That let players get a feel of the Warbirds and their environment that they will be starting out with so they can prepare for when season 8 goes live.
But the level cap will be level 5 or 10 and Romulan Exclusive Missions will be limited.
However in the ship requisition room you will be able to see higher tier Warbirds so players can pick what ship they want for when they hit level 50 when season 8 starts.
There's nothing to really "prepare" for, though I'm sure we'll get more info as time goes along, and it would be really dumb for them not to test Romulan content on Tribble or Redshirt before it goes live. Better to "spoil" it a little by letting a few hundred or thousand people test it than have it go live and make tens of thousands angry.