We have now got a little bit of info regarding one of the upcoming Digimon Adventure shorts which were successfully crowdfunded!
The two storyboards are from the first short which is called To Sora. As you can see that it will feature Sora and Biomon along with a call from Mimi.
It seems that this is the short that will be available online out of the five where the others will be available on the crowdfunded Blu-ray.
Hopefully, more will be released in the coming weeks and months.