He needs a run of games in a first team environment. Whether he'll get that chance at Bournemouth now is questionable.
If they decide he's not going to be their first choice pick for the season he will need to get out on loan though, that might even be the best thing that could happen to him, he could develop under less pressure down the divisions. The danger is that he ends up benchwarming for the season, which would be useless for his development.