if the Young Bucks have contract options, I hope one of them is not TNA. not unless they changed their look. they're skinny with hardly any muscle who don't even look like wrestlers.
While they are bigger now than during their first run with TNA, it really is not important. They were over then, and are still over now. And they are not the first team to not have the "look" that some fans seem fascinated by, yet still manage to get over everywhere they go and whip crowds into a frenzy.
There are the best tag team in the "BIZ-A-NESS" at the moment for a reason.
Why would The Young Bucks sign with them? Their probably making more money and more notice with DGUSA and The Indies and occasionally ROH show as well as the IWGP Jr Tag Team champs in New Japan than they would in TNA who let's not forget got the "Brilliant" idea to make them feud and split them up the last time they were there.
They have always been open to coming back, and a steady paycheck and job with TNA sure beats having to book yourself and try to market and sell your own merch.
Generation Me could have a great feud with Bad Influence, with a best of 5 series similar to what BM had vs MCMG in 2010, and then go on to feud with Bromans. And since Zema is associated with Bromans, Manik could join GM for some cool 6 man matches.
Given the lack of actual teams in TNA's tag division, I think transitioning those belts back to BI would be smart if the Bucks come back. Let them feud with BroMans first then move into a summer series feud with BI and capture the tag titles. Post tag title win you turn them heel, as they work best as heels. They should then begin a run challenging any and all tag teams to prove they are the best tag team of all time beginning with The Hardy Boyz (Matt returning for a one off) at BFG.
Teams that can possibly be brought in for one off challenges (they can work 2 matches a month on Impact) :
Rock N Roll Express
American Wolves or DoJo Bros
Super Smash Bros.
Powers of Pain
The Dynasty (Joey Ryan & Scorpio Sky) OR The Real American Heroes (Joey Ryan & Karl Anderson)
The Fightin' Taylor Boys (Brian Cage-Taylor & Ryan Taylor)
Killer Elite Squad
BLK OUT (Ruckus & Jeez aka Rashad Cameron)
Shark Boy & Curry Man
The Spectral Envoy
Pieces of Hate or QuackenSaw
LAX (one night only reunion)
The Bravado Brothers
Dark City Fight Club
+ Tag Teams from AAA & Wrestle-1
One off challenges allow TNA to book teams to come in for one single appearance allowing them to not have to sign anyone or build a division. The Bucks certainly constitute a team who could take this angle and run with it, and it's an angle that could run for quite some time if TNA allow it to.