Vanquish teased by SEGA, but is it a PC port or Sequel?

UPDATE: A New image has been teased today, which looks to be pointing to a May 2017 release but for what exactly? Hopefully we'll find out soon.

After recently getting Bayonetta on PC at long last, one thing that fans have wanted is to also get Vanquish ported over and it appears that may be happening as Sega have just shared the following image on their social channels.

What do you think? Will we see a sneaky port like we did with Bayonetta or do you think it's a sequel? :o