Is the new Yankee Stadium to be an exact replica of the current one or will it be unique? Aside from the obvious reasons for building a new stadium (updated / bigger / more modern), will their be any features to it that the existing Stadium doesn't have?
Were there any other locations considered before they decided to put it next to the current one?

yankees are so gay, why would u build the same thing again? and yes its an almost exact replica of the old stadium, i mean even the the mets are making their new stadium something new and fresh, the yankees are just really gay

No it will be different. If you study aerial photos ofYankee Stadium, the RF is shortened because the Elevated Subway line marks the end of the stadium property. Pilfering Macombs Dam Park allows the stadium a little more space away from the El. MLB has minimum fence distances for new ballparks, so there won't be a 296 FT RF as the old stadium had, or the current 314 in RF.

Then again I could stand corrected.

The new stadium's design, by HOK Sport, consists of two separate structures. The exterior will be a wall circling the perimeter of the Yankees' new property, and will resemble the pre-renovation exterior of the original Yankee Stadium. The interior will be a modern ballpark, with increased modern amenities that have become a staple of every new ballpark since Oriole Park at Camden Yards opened in 1992. It will feature a replica of the copper frieze, that lined the inner wall of Yankee Stadium's upper deck until 1973. This lining was torn down during the 1974-75 renovations. A replica of this frieze lines the portion of the original structure that was removed during those renovations, beyond the outfield wall. It is above the bleachers and faces River Avenue. The Yankees use this frieze as a marketing tool on television and in print, and have allowed the sporting-goods chain Modell's to use it, too

Between the perimeter wall and the stadium will be an area that the Yankees are calling a "great hall," which would feature more than one million square feet of retail space, a significant increase from Yankee Stadium.

The field's dimensions will be identical to those at Yankee Stadium and at the Legends Field spring training minor league baseball facility in Tampa, Florida. The new stadium will seat 51,000 fans, compared with 57,545 in Yankee Stadium. The new stadium's seating will be spaced outward in a bowl, rather than upward in stacked tiers, placing most fans further away from the field. Field-level seats will be near 30,000, compared with 20,000 in Yankee Stadium, and about 20,000 seats in the upper deck. Although nothing has been officially announced, the design of the new upper deck appears to have two distinct sections, similar to the current Tier Box closer to the field and the Tier Reserve. There will be half as many bleacher seats as Yankee Stadium's 7,500, but 1,000 standing room spots will be added. In addition, there will be 60 luxury boxes between the two decks, replacing the loge section of the current stadium. Yankee Stadium has 16 luxury boxes, around both sides of the press box, which is directly behind home plate.

"Phillies Own Mets" - you are an idiot. The Mets new stadium isn't new and fresh at all. It's an Ebbets Field throwback. Which by the way, I happen to love.