That’s what it is starting to seem like. I believe the title for TFA dropped not long after production wrapped. Production for IX wrapped last month. It is possible they could announce it this month, but I’m starting to think they will wait until Celebration. Some people think that it will be before, because they think there will probably be Episode IX merch with the title on it, which would make it harder to keep under wraps.
I think there are good arguments for both, but we will definitely get it by April 12th or 13th. If that’s the case, it will probably be revealed with the trailer, and it’ll also be attached to Endgame, which will be coming out later that month, on April 26th.
If it drops before then, it’ll be a surprise, to be sure, but a welcome one.