In 2007, LEGO released 2 Batman sets, all of these sets have been retired. For that year, the total price of all retail sets cost $80, today those sets are valued around $5,163, a growth of 6355%.
Most valuable 2007 LEGO Batman set
7787 The Bat-Tank The Riddler and Bane's Hideout $3,200.00
Highest growth 2007 Batman set
7786 The Batcopter The Chase for Scarecrow +6444.41%
2 sets

7786 The Batcopter The Chase for Scarecrow

Theme Batman
Year 2007
Pieces / Minifigs 293 / 2
Availability Retired
7786 LEGO Batman The Batcopter The Chase for Scarecrow
Retail $29.99
Value $1,962.67
Growth  +6444.4%
Annual growth 14.1%

7787 The Bat-Tank The Riddler and Bane's Hideout

Theme Batman
Year 2007
Pieces / Minifigs 645 / 3
Availability Retired
7787 LEGO Batman The Bat-Tank The Riddler and Bane's Hideout
Retail $49.99
Value $3,200.00
Growth  +6301.3%
Annual growth 14.5%