Kizuna has been misunderstood because of the official translation (and by extent, dubs) messing things up to the point it gave the wrong idea. It was a very good movie to me, especially about its themes of not forcing your growth and not getting stuck in the nostalgia from childhood.
The new movie also had a similar message from the original 02 TV series -- to not live stuck in the past and move forward.
I'd like something like Kizuna and The Beginning, but with a brand new cast and no ties to any previous TV series. I'm waiting for Seekers to be finished so I can finally read it calmly (I don't like to read novels while they're still ongoing, sorry...)