Tattoos in general are a bad bad idea. Unless its something that defines your life, like a military tattoo.
These things are permanent or scarring. And your body sags. And jobs frown upon any extravagant markings.
So something is gonna have to still mean something big to you 30 years down the line (be ready for crappy sequels and whatnot), maintain its shape and definition when you age and wrinkle and sag (it will blur and droop), and be easily cover-able so not covering your forearm or face unless you're ready for the consequences.
If you deem it worth it after taking all that into consideration go for it.