On the Spotmatic group I'm on, this has been referred to as "As the Takumar Turns".
In a nutshell:
Hoya tendered a merger agreement. Pentax accepted. Hoya hinted they might close or sell the camera division. Pentax' board of directors (BOD) freaked out and fired the pro-merger CEO, then called off the merger. Hoya had a deal in place that said they couldn't negociate with other buyers until May 31st, so Pentax was stuck until then. Some noises were made about Pentax going alone, but that wasn't feasible in today's market. In the end, apparently, the Pentax BOD realized they had no choice and accepted the merger.
Eventually, I'd expect Hoya to move the current Pentax BOD out. What's going to happen with the camera division is anyone's guess. Hoya mainly wanted the Pentax medical & optical divisions, which are the money makers.