The last two BlackBerry branded phones were re-branded versions of TCL handsets. The mid-range BlackBerry DTEK50 is actually the Android flavored Alcatel Idol 4, with BlackBerry's software inside. The high-end BlackBerry DTEK60 is based on the TCL 950. Today's announcement basically expands on the dealings that allowed the DTEK50 and DTEK60 to be launched. Alcatel is a joint venture between TCL and Alcatel-Lucent.
Meanwhile, BlackBerry CEO John Chen had promised BlackBerry fans that the company would produce one more home grown handset with the iconic BlackBerry physical QWERTY on board. The press release announcing the deal with TCL doesn't make mention of this phone, which has been given the code name of BlackBerry Mercury.