Nope. He hasn't been seen. This isn't to say he won't show up in the film. They still have a ton of filming to do.
Eh, just means he won't be in the city battle/final battle. Which is fine with me. There will be plenty of other filming locations and scenes that he will potentially be in. I just hope his character is more mature and sensible this time.
I hope they'll say that he got some uber well paying job and he's moving to Wisconsin or something at the beginning. Later on, he sends Sam a postcard but I hope that'll be the extent of his existance in the film
I have to say, he was far more annoying than the Twins and more pointless. I'd rather have Glen back, but we know that isn't happening.