What happens next?

How to grow an aloe plant with just an aloe leaf 
Understand that a leaf may not form roots and grow. 
While it is possible to grow an aloe vera plant from a leaf, the chances of the leaf taking root are very slim. Aloe vera leaves have a lot of moisture, and tend to rot before they can take root.
Growing an aloe vera plant from an " offset " is more effective. Find an aloe leaf that is at least 8 centimeters (3.15 inches) long.