diff --git a/TODO b/TODO
index 21c5a97..d855ca5 100644
--- a/TODO
+++ b/TODO
@@ -4,6 +4,14 @@
 
 Misc
   - Deep cloning level for util.clone()
+  - Optional preprocessing support
+    - Ability to disable features that wouldn't impact base functionality
+      - For example, one may wish to have type checking enabled for development
+        but may not want the performance hit for their production code.
+        Disabling type checking, as long as the proper types are passed to the
+        functions, will not impact function logic.
+    - Should be able to run source file without preprocessing, so C-style macros
+      cannot be used (# is not a valid token)
 
 Property Keywords
   - Restrictions; throw exceptions when unknown keywords are used
@@ -16,6 +24,16 @@ Property Keywords
   - static; method/property accessible via class definition
   - event; designates a supported event
 
+Typing
+  - Support JSDoc-style type definitions for parameters
+  - Syntax:
+    [ 'string', 'number', function( name, age ) {} ]
+  - Optional; if a function is simply provided, rather than an array, no type
+    checking will be performed
+  - For abstract methods, simply leave the function off (last index)
+    - Provide option to throw errors on any type mismatch
+  - Auto-cast, unless casting is impossible, then throw error
+
 Documentation
   - Ensure all docblocks contain only valid JSDoc tags
   - Generate documentation