Do you have any info on the teen brigade?
Ah, the Teen Brigade. We certainly do have information on them, the only question is "which one"?
Because, as with many names in this world, the Teen Brigade is now a legacy. Albeit, a legacy with a very tenuous connection to the original, but a legacy nonetheless and an interesting one.
(Panel from Marvel's Avengers #1, depicting a dramatization of Rick Jones's Teen Brigade meeting the original Avengers.)
The Teen Brigade has a storied history as a behind-the-scenes group of teenagers aiding heroic figures that stretches back to the time of the First World War. Started as a grassroots organization by teenaged admirers of the Phantom Eagle who were too young to enlist and fight in the Great War but wanted to assist, the original Teen Brigade gathered intel to aid the Eagle and his team, Freedom's Five, using early shortwave radio to communicate with one another at points across America.
This Teen Brigade was followed by other, successor groups as members aged into adulthood and new members joined. The Brigade operated as a whisper network of young amateur radio enthusiasts through the 20th century, but suffered a steep decline with the advent of other forms of communication - specifically, the Internet.
By the time of the modern age of heroes, Rick Jones was one of only a handful of members of the Brigade remaining - and yet, his Brigade will probably be remembered as the most impactful in history, as it was his distress signal that caused the formation of the Avengers. Jones's Brigade would aid the Avengers on several early missions before, too, fading into obscurity.
Enter the "new" Teen Brigade.
(Photo of Ms. America Chavez from Chavez's Instagram, I'd post what Chavez actually looked like during her time with the Teen Brigade but I don't want her to hurt me.)
Another incarnation of the Teen Brigade made a splash recently, this one led by the mysterious young man known as Ultimate Nullifier (yes, just like the dangerous weapon that the Fantastic Four used against Galactus. no, we don't know why, this man is a complete enigma). Nullifier was joined by his then-girlfriend Ms. America Chavez (yes, she's a very out-and-proud lesbian, no, we haven't asked her about this because it seems to be a sore spot), as well as depowered mutants Barnell Bohusk and Angel Salvadore, and the In-Betweener. A cosmic entity representing the balance between order and chaos.
Again, no clue there.
They aided the Defenders of the time from the shadows, fighting against the group known as the Young Masters, who would later come into conflict with the students at the Avengers Academy in the employ of Jeremy Briggs. And at this point I'm just writing filler because this is just about all we know about this Teen Brigade.
Presumably some iteration of the Teen Brigade is still around, doing what they've always done, but nothing has caused them to come out of the shadows just yet.