The boys announced through their Twitter on the 12th, "2 0 1 4 . 0 2 C O M I N G S O O N #AlphaBAT_Attention", along with the image you see above. Although it leaves us hanging about the specific date, we know that it will be taking place sometime this month.
AlphaBAT made their debut with a cute & hip hop fusion concept with "AB City" and got fans into the holiday spirit with "Surprise Party". With the image released above, it seems that they may be hinting that the boys have a more powerful concept this time around.
Keep an eye out for their comeback!