Upvote:3
The Extension of Status application was automatically abandoned and moot when you left the US. ("Status" only exists when you are in the US, for a particular stay, and once you left the US, there was no "status" to "extend" anymore.) To enter the US again, you will be entering anew on the basis of your visa, and you will be granted a new status and period of stay based on your visa, and it is unrelated to your previous stay.
If you had departed after your previous status expired, you should bring your I-539 receipt to show that you were legally staying for that period of time because you had a pending application.