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 $1,400, a growth of 1650%.
Most valuable 2007 LEGO Batman set
7787 The Bat-Tank The Riddler and Bane's Hideout $900.15
Theme Batman
Year 2007
Pieces / Minifigs 293 / 2
Availability Retired
7786 LEGO Batman The Batcopter The Chase for Scarecrow
Retail $29.99
Value $499.63
Growth  +1566.0%
Annual growth 9.5%
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 $900.15
Growth  +1700.7%
Annual growth 11.1%