Philip Bloom from CPN posted a video showing off the autofocus performance of the EOS C100 makes a mention of an EF 50mm f/1.2L II USM lens. This is a new standard prime lens not announced yet.
According to CR, the successor of EF 50mm f/1.2L USM lens is being developed, maybe this lens is the successor. You can watch the full video from CPN website.
via: CR
Read More: Canon Rumors