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Maybe they did not predict the future. They already know what is going to happen and they wanted to show their power with placing them into some cartoons basicly. 

Here is the conspiracy theory: They are controlling the world and they have a strong power. By the way, I do not know who they are (I do not want to be a target 🤫). 

Think about it when you have a very strong power, you want to show it every one right. It is the human nature. They love to show their power and controlling strength. Therefore, they place some signature as an artist and they wait audience to find out these signatures over events. 

When people find out these signatures later on, they are proud and happy. They are now known by huge audience. 

Just thinking and interpreting. It is conspiracy theory after all. 🤔🤨🤔😨

 They are not predictions, they are simple coincidences that used logic and that unwittingly became reality.

 Being a world-known building, it was at risk of disasters and terrorist attacks from the beginning, since if someone particular or some criminal or terrorist organization wants to be noticed, it must attack very important places or places.

 As were the twin towers, it could have been any other well-known building that had a great symbolic and patrimonial value for the nation.