It said "The first day of the rest of your life". It is precisely that!
You are Spider-man. You live in NYC. The crimes are still happening. You should continue to fight crime, rescue hanging workers, recover childrens' baloons, etc. This is so you can collect ALL the rewards. Then you can try to find ALL the hint tokens, All the Skyscraper tokens, All the Buoy tokens, etc. There are also the challenges to complete.
Alternatively, if this doesn't float your boat, take the game to your nearest "Game" store and trade it in for something else! Or possibly let your younger brother play with it instead!
If this doesn't interest you either, you could possibly heat the disk up by boiling it in a pan on the cooker for 20 minutes, then you can shape the disk around a plant pot to make a really unique plant-pot holder. Another thing to do with it is to put in in the microwave on full power for 1 minute. The disk gives off a display of tiny blue lightning before it finally bursts into flames. A really amazing sight. Unfortunately, these last two ideas DO actually ruin the disk, but they are there as options if you want them.
Please note, I cannot be held responsible for your actions, not do I recommend that you do any of these actions.
Actually, you get 50,000 hero points and go onto 'The Second Day of the Rest of your Life' and you have to get Swing Speed 8. And then -- (if you have got all the awards and tokens) ta-da... you can now destroy the disc. (or sell it) (or keep beating thugs up).
Bye True Believers.
Spider-man! Spider-man!
Does whatever a Spider can!...