I normally ignore rumors for the most part as most end up being untrue or only partly true and the parts that aren't true making them seem completely groundless. But since I find that these rumors tend to be given much more weight than they should with the fans of the younger groups every once in a while I'll address those to remind people that if something sounds too good to be true than most likely it is.
The current rumor is about Morimoto Ryutaro returning to Hey! Say! JUMP by releasing a new single with him in January, titled RE:START.
One of the reasons that the rumor doesn't pan out is that it goes back to the problem of rumors that only have a single source that isn't really verifiable. Sure the new volleyball unit rumor panned out except the group name wasn't the same nor were the group members, so if anything it was one of those annoying partial rumors that at least had the tradition of FIVB unit debuts and it was coming from an online store not a personal blog to back itself up. This current rumor though has nothing to back it up other than one personal blog in Japanese saying that it's true and others just believing them.
And Johnny's wouldn't make such an announcement unless it was at some kind of event for HSJ which they aren't scheduled for any. In fact it looks like they may not even have concerts this winter as there has been no announcement for one, as other groups have already made their winter concert announcements so fans would have enough time to ballot for tickets from them.
Also there has never been a case of a member of a group being caught in an underage smoking/drinking scandal and being returned to their group. You just have to look at what happened to Uchi Hiroki and Kusano Hironori to see that Ryutaro has a greater chance of ending up like them than being able to rejoin the group. And if he does get the chance to rejoin the group he's going to have to do more than stay out of the spotlight long enough. He'll probably have to be placed on Trainee status for a while and be a part of something, like Uchi and Kusano were in 2007's PLAYZONE, before regaining his Junior status and then maybe, just maybe he'll get a chance to be a part of the group.
I know a lot of fans are still clinging to the hope that since Johnny's net hasn't updated the profile for HSJ to exclude Ryutaro that there's still a good chance for him to return. I personally think that they're just trying to avoid any major backlash from HSJ fans and are just waiting for people to get used to the nine member version of the group a bit more before they finally make that update and officially state that he isn't currently a member of the group.
And on a personal note, as I'm also a fan of NEWS it would honestly and truly piss me off if Ryutaro was able to return to the group just like that. I may not have been a fan of NEWS when they were still eight but I became a fan not too long after the group's return and the feeling and hopes of Uchi and/or Kusano returning to the group were still rather high, especially with them returning to being active with PLAYZONE. And then there was the fact that there was no doubt that Kanjani8 wanted Uchi back, the infamous encore at one of their concerts where they brought him onstage to announce that this was Kanjani8 comes to mind. But in the end neither of them returned to their groups, even Uchi who had been popular before his scandal and had a group publicly state that really wanted him back. They worked hard for their second chances and I expect no less for Ryutaro as it would be a cruel slap in the face for him not to have to go through something similar to those two before even being evaluated by management on whether he should return to HSJ or not.
I know that may seem harsh but I wouldn't have an issue if Ryutaro went the same path as Uchi and Kusano and then was put back into HSJ. In fact I think I'd come to appreciate him more, as that would show he has a lot of dedication to the group. And I've always felt one of the reasons Uchi and Kusano didn't get that chance in the end was because of the mess that PLAYZONE ended up being with the Akasuka Akira drug scandal. Which unfortunately just sucked for them as they really couldn't control that. But I honestly cannot accept Ryutaro's return to the group without him having to go through something to show his resolve to really want to be in the group. Especially when there have been Johnny's in a similar circumstance that had to go through something like that and still not be able to return to their groups.