I think it's going to be a mixture between the two. From what we've seen, the Resistance is/was a very small fighting force. To be essentially wiped out so easily during the chase to Crait means they were a few thousand strong, nowhere near what the Rebel Alliance was.
From what we've seen from supposed reports on the set, I think that there will be a mass recruitment of people standing up against the First Order, but it won't be as many as we or the Resistance themselves think. Judging by the end of The Last Jedi where no one responds to the distress call, most of the galaxy is now firmly under the heel of the First Order and can't or won't rise up. They'll probably get an actual sizable force (ha) for the climax of the film, but it'll be another up-hill battle similar to the Battle of Endor (in terms of combatants only, not another beat for beat rehash, I hope) where the Resistance is out manned and outgunned by the frankly ridiculous size of the First Order's army.
While they'll probably have a good sized army for once, it is going to be a
since to the mainstream, that's what Star Wars is. They think of a small group of rebels with laser swords and aliens fighting against the man before anything else. Because of this, and because of where Episode VIII left us, that's what it's most likely going to be.
And on another note, anyone who thinks we're getting an official title reveal before Star Wars Celebration in April is deluding themselves. I just saw people getting up in arms that Disney didn't announce the title during an earnings call today.
Both Episode VII and VIII had their teaser trailers released at Celebration (not counting that one weird one for TFA with the Snoke VO, that was more a teaser for a teaser), and given this is the final film in the sequel trilogy, they're probably going to go all-out for a grand reveal in April with the title and teaser reveal.