It's really a shame since there's just so much they could have done with the original concept.
The original already dealt with a destructive virus running rampant at an arcade.
Going from hacking arcade machines to buying from e-bay is a real cop-out.
Heck, Wreck it Ralph 2. Easily could have made it start with Wreck it Ralph 2, an actual sequel of the game they get transferred over to.
Maybe make fun of the fact the game is now 3D while they were always 3D from their point of view.
It seems like such an easy thing to write if only you get a single good idea to set up the main conflict.