First up, there will be a Hoshiai no Sora Special Collaboration moviebetween AIKI and Merochin.
Next, the production of a Hoshiai no Sora Special Fan movie has also been announced! Google translated this as a "PV that will be a memorial for Hoshiai no Sora”.
No other details about these two projects have been revealed. More details shall be announced soon on their official website and Twitter account.