Here is the most recent 2011 3D feature release schedule, as posted on Box Office Mojo here

The Green Hornet (in 3-D)

Sony

1/14/11

Sanctum (3D)

Uni.

2/4/11

Gnomeo and Juliet (in 3-D)

Mira.

2/11/11

Justin Bieber: Never Say Never

Par.

2/11/11

Drive Angry (in 3D)

Sum.

2/25/11

Mars Needs Moms (in 3D)

BV

3/11/11

Rio

Fox

4/15/11

Thor

Par.

5/6/11

Priest (in 3D)

SGem

5/13/11

Pirates of the Caribbean: On Stranger Tides (3D)

BV

5/20/11

Kung Fu Panda 2

P/DW

5/27/11

Green Lantern (in 3D)

WB

6/17/11

Cars 2

BV

6/24/11

Harry Potter and the Deathly Hallows (Part Two in 3D)

WB

7/15/11

Captain America: The First Avenger

Par.

7/22/11

The Smurfs (in 3D)

Sony

8/3/11

The Darkest Hour

Sum.

8/5/11

Spy Kids 4: All the Time in the World (in 3-D)

Wein.

8/19/11

Fright Night (in 3-D)

BV

8/19/11

Final Destination 5

WB

8/26/11

Untitled 3D Shark Thriller

Rela.

9/2/11

Piranha 3DD

W/Dim.

9/16/11

Dolphin Tale 3D

WB

9/23/11

The Three Musketeers (2011)

Sum.

10/14/11

Puss in Boots (working title)

P/DW

11/4/11

Happy Feet 2 in 3D

WB

11/18/11

Arthur Christmas (in 3D)

Sony

11/23/11

Hugo Cabret (in 3D)

Sony

12/9/11

Alvin and the Chipmunks: Chipwrecked

Fox

12/16/11

The Adventures of Tintin: The Secret of the Unicorn (in 3D)

Par.

12/23/11

Journey 2: The Mysterious Island

WB

2011