He's in the comic because Marvel think it will help sell comics.
Personally i think its pointless having him there. He is nothing to do with the story, doesnt add anything to the team, and it doesnt look like the comic needed him to boost sales because it shipped a load.
I don't think he will, and to be honest he does not need to be in the series at all. I have enjoyed the GOTG from the 90's and last run they had. I'm going to give this run the first 6 issues, but so far it's kinda, I dunno not all that for me.