they all have a previous less
expensiversion with their face exposed.

their powers are translated 100% better with the unique powers than the general ones

They make one sweet freaking 900 point team

They all have an older version with a keyword that the new one doesn't have?

I'm really grasping at straws.

are they all featrued on feat cards or battlefield conditions?

featured in promotional material?

last one them im out the door.....the sculpts are all facing the same direction as the previous incarnations sculpts

same pose as before different costume?

They've all been butchered by Rob Liefeld?

lolz Xer0gravity best guess ever!

Okay, I'll give one more try.
The Golden Age versions of these same characters have all had at least one of the same Standard Power as their Modern Age counterpart:
Phoenix - Telekinesis
Blob - Charge
Juggernaut - Charge, Super Strength, Impervious, Invulnerability, Toughness
Gambit - Stealth, Energy Explosion, Perplex
Rogue - Charge, Super Strength, Invulnerability, Toughness
Domino - Stealth, Super Senses, Probability Control
Storm - Force Blast, Energy Explosion, Smoke Cloud, Energy Shield/Deflection, Ranged Combat Expert

I am now officially in the straw-grasping phase of this contest

All have actually been to Krakoa?

I don't think these are first appearance costumes are they?

All are alternates to their regular costumes

Storm is in Wedding Dress
White Phoenix
Gambit & Rogue are a costume reboot
Domino is new x-force
Not sure about Blob and Juggs though

Captured and or manipulated by someone?

had an action figure that included a piece of a larger model, that all combine to make a large model. Maybe marvel legends set?