I dont really think they are going to bring back Romulus unless they explicitly decide to throw the entirety of Abrams movies under the bus canonically speaking-as it stands, the destruction of Romulus happened in the prime timeline, and unless directly contradicted in the Picard show, for example by starting episode 1, season 1, on Romulus, with the date plastered on the screen AFTER the place is supposed to have been destroyed, nothing is going to change that.
I mean they threw out 95% of The Animated series canon so it wouldn't exactly be the first time they were selective with canon.