While the OP is not meant seriously, I agree with the notion that LBP2 could become a threat to other games - provided it will be as successful as many predict or hope.
Rol's predictable comparison with Nintendo's situation is redundant though as it doesn't make sense in this case in my opinion. A better comparison would be WoW or the COD franchise which are played for a long time and assumed to have heavily cut into the possible sales of other franchises as well. If LBP2 is really a game with almost endless possibilities, it could not only cause problems for other franchises on PS3, but also for some of Sony's own franchises. For this to happen it needs to be a BIG success though, i.e. >10 million copies sold.