I expect that Decode will be faster than Re Digitize was. We already have a team and a set of tools, so we won't have nine months where we can't get anything done.
We're not in any way affiliated with that project, I actually only heard about it about two weeks ago. We try to stay at least relatively close to legal, and Project Ark, while awesome, sadly, is blatantly copyright infringing.
After having a quick look at Project Ark, I'm actually quite certain they're well within legal grounds with what they're doing. The models and textures are all custom made, none are ripped from any of the Digimon games and they aren't making money from the game. As far as I'm aware that's all that's required to make a fan game completely legal, although I could be wrong.