HTC launched the Butterfly S, successor of the first Butterfly in several countries including India last year. @evleakshas leaked the first press image of the J Butterfly successor codenamed B2. The final name of the smartphone has not been finalized, but it could be just called Butterfly 2.
The design is similar to the Butterfly with dual front-facing speakers, but this seems to have polycarbonate body, instead of metal build. The capacitive touch buttons are replaced by the HTC logo, similar to the HTC One M8.
According to HTC ROM developer @LlabTooFeR the specifications of the upcoming Butterfly smartphone would be similar to the HTC One (M8) and the phone would be released in select markets such as Hong Kong, Taiwan, Japan and some Asian markets.
It is not clear if the phone would have the same Duo camera arrangement on the back like the HTC M8. The leaked image shows the phone in Red, but it is expected in other colors as well.