If you were waiting for a price drop on one of these games this is the time to do it. This will likely be the best deals on these games until a possible discount on Black Friday. As for the 3DS games they might get scarce and see their price jump like all the Zelda games that can't be had for less than 40 now.
The Witcher 3:Wild Hunt - $39.99 for PS4 and $37.98 for XBONE
Batman:Arkham Knight - $41.49 for PS4 and $44.99 for XBONE
Mario Kart 8 - $41.99 (WiiU)
New Super Mario Bros 2 - $25.97 (3DS)
Luigi's Mansion - Dark Moon - $27.99 (3DS)