I figured I'd make some suggestions, in no particular order, after the jump.

Gil Hodges

Pro: 

• Proven winner, especially in New York.  Won two World Series here, one as a player and one as a manager.
  
• Former Met player.
• Well-regarded.  Often mentioned in the same breath as Joe Torre, as a guy who could make the Hall on a combined player + manager platform.  Also has had his number retired by at least one team.
• Once talked a suicidal player into not killing himself.  Now that is gangsta.

Cons:

• Managerial career in Washington was less-than stellar, putting up a .420 winning percentage over five seasons.
• Dead.

Billy Martin

Pros:

• Won the division with four different teams, including a NY team (Yankees).
• Born four years after Hodges.
• Never took no sh*t from Steinbrenner.

Cons:

• No NL managerial experience -- can he handle the double switch?
• Widely considered a Yankee; has no Mets ties.
• Is also dead.

Morris Buttermaker

Pro:

• Lots of experience with a rag-team team.
• Doesn't care if his pitching staff throws like girls.
• Can handle punk kids who think talent alone will get them places.

Con:

• May manage his alcohol consumption worse than Wally Backman does.
• Couldn't beat the Yankees.
• Is a fictional character.
• The actor who portrays him is dead.

Lou Brown

Pro:

• Also has lots of experience with a rag-tag team of veterans and AAAA types.
• Creative motivator.
• Charlie Sheen is more f*cked up than Ollie Perez.
• Beat the Yankees when it counted.

Con:

• No one wants to see Jeff Wilpon (or Saul Katz, yuck!) naked.
• Is also a fictional character.

Neutral:

• The actor who portrayed him is also dead, but let's face it, James Woods would be an adequate replacement at worst.

Obi Wan Kenobi

Pro

• Dead.
• Could probably get some Rebel medic to fix Carlos Beltran's knee.
• How freaking awesome would it be to see David Wright yield a lightsaber!!!!!
• That practice orb thing they used is nastier than an R.A. Dickey knuckleball.
• Unlike that Darth Vader guy, so obviously not a Yankee fan.

Con

• No MLB experience.
• Unlike Vader, would not force-choke K-Rod.
• We'd get the Ewen McGregor version.