The opening theme will be "Mikakunin Hikousen" (Unidentified airship) by Tanimoto Takayoshi.
He's performed theme songs for Dragon Ball Z Kai, Transformers Superlink, Zatch Bell, and he is no stranger to Digimon fans either, having done a number of Digimon songs in the past:
One Vision in Digimon Tamers
Miracle Maker from Digimon World 3 (with Wada Kouji and AiM)
Dark Knight -The Invincible Champion- in Digimon Xros Wars
Evolution & DigiXros Version Taiki in Digimon Xros Wars (with Wada Kouji)
Evolution & DigiXros Version Kiriha in Digimon Xros Wars (with Wada Kouji)
We Are Xros Heart Ver. X7 in Digimon Xros Wars (with Wada Kouji and Ayumi Miyazaki)
He was also one of the singers for the 10th Odaiba Memorial song- "A Door into the Future ~Ever Since That Summer Day~" with Wada Kouji, AiM, Hassy, Sammy, and Ohta Michihiko.