I know the Answer... two simple words... Hard Drives
The answer is elementary my dear...
If still alive, Zorin, would have gone after one of the few high tech industries that was a necessity for the computing industry, but that was highly or completely centralized in a single geographic location... like hmm say Hard Drive Manufacturing!?!?!
And he would repeat his same trick he tried in the movie, making the massive terrorist attack appear to be a natural disaster like hmmm..... say a FLOOD!?!!?!?! That would drive the products prices through the roof, reaping record profits from the secret production surplus that he had been storing in Mexico.
And after the flooding you would see a quick purchase and consolidation of the industry like hmm... WD buying Hitachi and Seagate buying Samsung <cue detective realization noise --- DA DA DUMMMM!!!)>
So there you have it, Zorin did survive the fall, and now Zorin Industries is the secret majority shareholder (hidden behind shell company pension fund managers) as the Majority holder in both Seagate and Western Digital. He is reaping record profits.
I would be quaking in my boots if I were a Toshiba HD exec right now... don't go into any rooms alone with a pretty lady for say the next ten years!!
And of course the sequel will be when he uses these record profits to create a massive underwater layer/submarine that is capable of creating seismic waves strong enough to create a massive earthquake and fulfil his original plan to destroy TSMC and UMC in Taiwan and wipe out the majority of the worlds Silcon Chip Production!!!!! (he just can't let a good plan die can he.)