Anything hatched out of a green egg, could be an Easter Egger and has the potential to lay green eggs. Do you have baby chick pictures? If it had a stripe pattern on its back when it was a baby, it still could be an EE.
With the photo you have provided here, it is hard to see the comb, but some of the neck feathers do look a little like an EE.
Leg color can be anything in an EE, so that does not tell anything. Also EEs not necessarly have ear muffs. I have 2 hens without those and they both lay some pretty green eggs.
Because hatcheries breed about anything with EE roosters to get EE chicks, your chances of having an EE are still pretty good.