Choose 4 people from comics to make a good stealth team. 3 stipulations though:
Team must be intercompany
Characters need to have had some special training.
Each character must fit 4 classes. 2 stealth, 1 recon/sniper, 1 heavy weapons. Here's my team
2 stealth - Deathstroke and Deadpool
1 Sniper - The Punisher
H. Weapons - Spawn, 1st age.
I think Kitty Pyrde would actually be a terrible person to have on your spec-ops. Yeah, the intangible thing is sweet, but she ruins any tech she runs through, which limits the various missions she can go on. "Kitty, run into Sunset Bain's tech department and retrieve this computer for us...shit, you can't, you'd just wreck it."
Anyways my team:
Stealth: Nightcrawler, Obsidian
Sniper: Grifter
Heavy Weapons: Fixer
1. Kitty Pryde. Computer knowhow, ninja training, AND her mutant abilities make her a natural candidate for any espionage mission. Her ability to disrupt mechanical equipment also makes her a deadly saboteur.
2. Hawkeye. OK, I was required to have a sniper, and I wanted someone who wouldn't kill (that just doesn't jive with this team's M.O.) So Clint with his full compliment of arrows will provide long-range support. He has sufficient survival and stealth skills (although he's not the best), but he can be an excellent delivery system for localized weapons of mass destruction (as long as they're mounted on an arrowhead, anyway), while the other team-members run interferance.
3. Wolverine. Say what you will, the "Old Man" has accrued more skills and tricks in his years than a single human lifetime could allow. He has experience working as a spy for decades and speaks a number of languages. Logan would be excellent for slipping this team through customs/immigration. He can more than hold his own in a fight, and his stealth skills are nothing to sneeze at. His uses range from building homemade bombs to connections in the Japanese yakuza. He's also a surprisingly good leader when he has to be, and while he and Barton might strain to go their own way, Wolverine would be an effective commander.... (OK, so long as he keeps his temper.)
4. The Vision. I had to think of a heavy weapon, and well, ain't nothing nothing heavier than a guy who can crank his bodily density up past a diamond's. Just imagine: Vision hovers alone above an enemy compound, while Shadowcat phases in and drops a beacon right under a select target. Vision immediately densifies to a weight in the hundreds of tons and drops like a stone, crashing through and pulverizing everything under him with a deadly mixture of precision and brute power.