That's setting a mighty low bar.
I was a fan of Bakula from Quantum leap, and he is fine in that procedural show he is/was in, but his portrayal of Archer irked me. Not all the time, but enough to secure him the spot at the bottom of the worst mainline captain in Trek.
I do think the B4 Data thing could be interesting from an ethics point of view, but if anything happened there, it would have happened shortly after Nemesis. Also I suppose the very act of uploading Data's engrams altered B4 and should have been more carefully considered in the first place. Nemesis was awful in so many ways. It was like shitty fan fiction that missed the core of the show and characters.
I think a lot of fans felt like Nemesis was an insult. I did. I walked out feeling pissed off and embarrassed to have dragged a friend with me. This show is a chance to set things right. It is fine that it is a show about Picard and it is fine if it doesn't dwell on the past, but it's going to have some connection to some of the TNG crew unless there is yet another time travel event or they are all dead.
In the leaked footage, Picard appears to be asking some ensign for something at a Star Fleet facility. Of course word of him being there would likely get to at least one member of the E-D/E crew and that could spawn a holo call cameo. I am thinking that will be the Riker cameo and he can mention how Troi is doing and settle that one. Or based on the plot of the show, Riker could be the Starfleet Admiral Picard asks for help in resolving it all in the Series Finale or in a season finale. People have connections and check up on one another and sometimes go to them for help. Data's backup being uploaded to a positronic AI possibly as a framework could check that box without at all being unrealistic. Data was an asset and was constantly described as unique, utilizing a part of him makes sense from an engineering point of view. Whether it makes sense to see that in the Picard show, well it's not like we are talking about yet another Spock sibling.
I can't really think of a reason to bring in any other cast members that wouldn't seem contrived on the surface. Worf or any TNG era Klingon in the new makeup style would make sense just to put an end to the BS until some asshole does another augment-like story to explain why changing costumes in a 50+ year old franchise is caused by an in-universe thing.
The franchise, particularly the Kelvin films, has used photos to show history. Perhaps that is all we get, a cameo of the TNG crew via a photo Picard is looking at while pondering his next move. If they are all dead and they do this as part of a memorial, that would show some serious balls.