Brooks won't return if the details of the story involve him having JUST returned. He doesn't want Sisko to retroactively be a deadbeat dad, which avoiding that implication is why he fought so hard to have that line about returning included in the DS9 season finale. Cirroc Lofton, who talks to him often, tried to make this known but I guess other people's personal narratives override this info. In fact, I highly suspect Lofton won't return either, both out of solidarity with Brooks and if any script has Jake saying his dad never returned. I'd probably add Penny Johnson (Yates) to that list too.
Anyone else though is fair game. I understand Kira and Quark returned for an ep of Lower Decks. I'd personally like to see O'Brian again.