The official Cardfight !! Vanguard YouTube site uploaded a 15 seconds preview snippet of DAIGO's new song Mugen ∞ REBIRTH :
Mugen ∞ REBIRTH has been picked to be used as the opening theme song for Cardfight!! Vanguard Link Joker Hen anime + the CM song for Cardfight!! Vanguard DAIGO Special Set .
And based on that short preview snippet of Mugen ∞ REBIRTH , yup it's very Cardfight!! Vanguard inspired that's for sure :p
At this moment , there're no further details on whether will Mugen ∞ REBIRTH be released as a DAIGO solo single in mid July .