It's a pretty good song... but not at all what radio likes these days, hence a flop. Maybe on AC it could do something, but it won't be a huge hit. I think their time is up
Backstreet Boys don't need Timbaland and no....it won't work that way. They could do well with the Neptunes though. Remember "The Call" remix with Neptunes? That was good.
Timbaland doesn't need BSB. Let alone the other way around. Timbaland is just overated right now (not that it's a bad thing)