I don't believe there was any confirmation on those items, but the two main guys who should be available this offseason are SPs Roki Sasaki (more on him in a second) and Tomoyuki Sugano, both pitchers. There was some speculation that 3B Munetaka Murakami might be posted this offseason, but he's more likely to come over in 2026 and will probably be one of the white whales in free agency after next season.
As previously discussed, Sugano comes without any meaningful restrictions in FA, but is in his mid-30s and will probably end up as a back-end RHP rotation guy.
Sasaki is fascinating, but is a potential victim of MLB's greed and the MLBPA's willingness to throw non-members under the bus. The linked FanGraphs article provides more info, but basically, because Sasaki (23) is under the age of 25, the International Bonus Cap Rules apply, which completely muddles his situation. If he's posted in the coming weeks, then the 2023-24 caps apply, but if he's posted on or after January 15, 2025, then the 2024-25 caps apply. Making things more annoying, the caps also can apply to any posting fee, meaning his team (Chiba Lotte Marines) might want to sit on him another two seasons if they want to get a multimillion dollar payout from an MLB team. Further complicating his situation is the fact that Sasaki has been battling injuries this season and his production was below expectations as a result.
Normally, these circumstances would dictate that the Marines would hang onto Sasaki until they could maximize his posting fee in two years, but there are whispers that Sasaki has a posting clause in his contract that could force the Marines to post him this offseason.
Whether the Cubs would be in on Sasaki is an open question, but, if Sasaki is posted after January 15, the Cubs would be better positioned to pursue him than they are now, and it is possible for teams to trade for signing bonus space in the event a bidding war breaks out,. He ticks a lot of the Cubs' need boxes (RHP starter, ++++ stuff, young, controllable, etc.) and would be an excellent addition to the team, but, again, there is no guarantee he'll even be posted this offseason.