Do not pass go, do not collect $200.. in other words..

Stop.. another Spoiler Alert!

The only think I can think of is if they were coming there to save the girl he took, not so much to kill him. They did ultimately wind up in the same room as the girl on the table.
I think you are right.. but they set the trap and were planning on killing him (not knowing where the girl was). The only reason they found the girl is because they followed the car home ( the one driven by the lady and son who rescued Will Smith) Had they killed him on the spot, they never would have found the girl.. maybe they hadn't become that evolved to figure that part out! lol

I just wish the ending didn't end the way it did... that's all I'm saying about in case someone didn't heed our warnings and reading this as we speak.

I need to go see it again.