Update eip-2200.md

Author: sorpaas

EIPS/eip-2200.md

@@ -76,7 +76,8 @@ implementation details, in the *Specification* section.
 
 ## Rationale
 
-The same as EIP-1283's rationale.
+The same as EIP-1283's rationale. If EIP-1884 is applied, then `SLOAD_GAS`
+related to SSTORE opcode will also need to be changed.
 
 ## Backwards Compatibility