Can't believe this hasn't been noticed yet -

[JulianPerez]

In this month's recent issue of JUSTICE LEAGUE starting off the Brad Meltzer run, there is one barely off-color comment about alien technology, with Batman saying something to Superman about how "he can't figure out the circuitry inside of his Legion Flight Ring."

WHOA, HOLD UP.

Superman has a Legion flight-ring?

Does this mean that Superboy and Superman are, once again, a part of Legion history? Because something that specific and off-color can't possibly be a mistake, especially in something as tightly plotted as the Meltzer League. After all, in JUSTICE LEAGUE #0, which gives brief flashes of the FUTURE, we learn that Green Lantern is going to get married and Wonder Woman is going to get engaged, and the identity of her paramour is not known we do know it is to be with (get this) a man of the male gender. And it's also going to involve the rebuilding of the Justice League Sattellite (last seen as debris in the Kurt Busiek issues).

The sattellite thing is especially exciting, because as much as I liked the Grant Morrison JLA (or at least, enjoyed it on the level of mindless fun) the Justice League Moonbase was a mistake. I mean, it didn't make any sense; the moon is THREE DAYS AWAY. Okay, yeah, the League has teleporters, but what if something happened to those? Only Superman and Green Lantern could get to the base and back. There's just no REASON for it to be so distant.

Getting back to the main point, Meltzer knows what the DC Universe is going to look like a few years from now, and apparently it includes Superboy/Superman in the Legion.

Incidentally, I'm really grooving on the Meltzer JUSTICE LEAGUE and I wholeheartedly recommend it to everyone, and I'm glad I didn't give it ia pass even though IDENTITY CRISIS was pretty bad. Meltzer's got one heck of a naturalistic gift for dialogue. In ONE ISSUE, albeit a double-sized one, we've got the Metal Men, cameos by Signalman, Deadman, and Felix Faust, Vixen's inner monologue (the first and only time that Vixen has ever been interesting, ever): "the Owl in me says to stop...but the Panther in me says keep on going." To say nothing of the first time that the Red Tornado's wife has felt fully three dimensional a personality, especially since (SPOILER!) the Red Tornado, with help from Deadman, was placed into a human body.

"Your hand," she says with a tear in her eye. "It's warm."

WOW.

[Gangbuster]

Here's hoping for the return of Superboy...  

I've always thought that an underwater watchtower would be fun, because it would make Aquaman a relevant member of the JLA again. Plus, the ocean isn't 3 days away...

[Great Rao]

I think it was Justice League #0 that also included a mention of Clark's secret underground tunnel leading from his house in Smallville, which he used to use back when he was a boy.

[Super Monkey]

Don't forget that the  "base on a real story" life of Superman film which shown him as Superboy.

However, these have all been playful hints but I won't believe it until I actually see Superboy in a story.

[DBN]

Then there is that image of Superboy & Krypto that appeared (along with the ones restoring WW as a founding member of the JLA and Joe Chill being caught) during the creation of New Earth in IC #6.

[DoctorZero]

I think they may be waiting for the rights situation to be resolved before they actually have an appearance.  Truth be told, I believe they want Superboy to be part of continuity again, both in Superman and Legion stories, but are holding off until they learn is they can use the name Superboy or have to call him young Superman as in the Legion cartoon.

[MatterEaterLad]

Yeah, it seems that they just call him Superman in the Legion cartoon, no matter how young he looks.

[DoctorZero]

I think once the rights are settled, one way or the other, we will see Superboy.  If they can't retain the rights they'll call him Young Superman or Superman. 
Personally, I don't care what they call him but I would love to see him back as a member of the Legion.