Looking for an old fan-made comic book set in DCAU

[mac402]

As per the title. I found it online somewhere pre-2008. It was set in the DCAU universe I think. The drawing also resembled the cartoon style. Don't remember the author or the title unfortunately. One issue had Batman sparring with Nightwing and the Teen Titans. Another one I remember featured old Bruce Wayne from Batman Beyond. It started with Bruce in his old costume fighting Terry in his Batman Beyond suit. Then Bruce Wayne disappears and all the heroes are looking for him. It ended with Bruce Wayne agreeing to merge with a hostless Spectre. That's all I remember from it. The drawing was of good quality. Somebody knows what I'm talking about?