One thing that could be done is the title image for the future hack thread actually (like the 'Oak's Aides' thing at the top of the team thread.
If you could make something like that that would be cool :3 'Pokémon Golden Oak' with perhaps a big yellowing tree/forest and a Celebi. I'm not entirely sure on what would look best but maybe you could play around with a few ideas and we'll let the rest of the team choose which looks best? :)
I like the layout of
this hack's banner, although the font needs to be easier to read. There are plenty of good looking banners around the progressing/showcase threads.