First of all, I've been trying to figure out who the hell these "Shining Stars" were that I've been hearing about, so thank you for clearing that up. Secondly, weren't these three already a tag team at one point? I know there were three of the Colon brothers as a faction, but I'm trying to remember if Epico was involved. Thirdly, these guys are really coming in at a bad time.
They were re-packaged at a point when the tag division was lacking and stayed away a bit too long. With the inclusion of The Vaudevillians, Enzo/Cass, and Gallows/Anderson over the past few months, there's not much room for another contending tag team right now. You have Breezango as the comedy jobbers of the division and Golden Truth as the novelty act, where exactly do Primo and Epico fit in? I don't even think the WWE knows as they've been spinning their wheels with them forever.
As for Carlito, I'd say it has a good chance of happening if they bring him in for the brand split. Or more likely, the gimmick gets scrapped, they get split up in the draft and become independent jobbers on Main Event, Superstars, etc. I just don't see this working out, shitty timing really.