While I personally don't mind Green Lantern, I seem to be in the minority... most people find it totally uncomfortable and painful. If you've never been on one, I do think it's definitely worth a try, it's quite unique and a bit like riding a Zipper--and it is very short. But for a lot of people, one ride is more than enough.
If you have the time, I personally think there are better food options outside the park (Pei Wei, Pick Up Stix, Mod Pizza, The Habit, etc.), and they do allow you to leave and return to the parking lot one time. However, it will take a big chunk of your day away, so if time is an issue, I'd agree with the other restaurant foot options the others have listed. I personally have actually enjoyed their chicken strips (and you get also get it with decent garlic fries only at the fries location across from Food Etc.--though it is an upcharge), and there is a Johnny Rockets if you want to play it safe.