1. It's obviosly not a Divinity: Fallen Heroes, which by Larian's reports, has been almost finished and still has it's trailer on company official youtube channel. So why not to updated and realease Fallen Heroes, instead of developing a new game? Isn't that would be cheaper and faster to satisfy fans and make some quick cash?
They weren't even the ones making Fallen Heroes to begin with. It was an external studio (the creators of the "Expedition" series, I think).
Incidentally, I heard that they aren't into game development anymore after releasing Expedition Rome.