At the beginning of 2017, the Court ultimately ruled in favour of the initiators, following which an agreement between the European Commission and the initiators was reached, making the launch of a signature collection possible. Concurrently, Romania entered the proceedings aiming to have the initiative dismissed by the Court, and supporting the Commission in its initial decision rejecting the ECI.
Source here: https://www.fuen.org/en/article/One-more-win-for-European-minorities-before-the-Court-of-Justice-of-the-EU