I don't know much about The Darkness 2 but what's wrong with it? Is it a console port?
All i've heard is the locked 60 FOV which is bad (yes it can make people sick) but i heard they would put in a patch to fix that.
Extremely linear and very short are a few of the criticisms I've heard.
To be fair, so was the first game. Yes, it had a semi-open world you could muck around in, but many areas were locked from the start and even the areas that were open were mostly(also) closed off in some parts until you did certain things. Besides a few secrets and gimmicks(notes and phone numbers), and a few small side quests(more like side jobs as most were very short), the game kept you on a certain path as far as the main game was concerned.
All in all it was a good game though, so if the sequel is as good gimmick wise(NPCs with quriky dialog or side quests, wide range of powers[that could also be used to find secrets,etc], phone numbers gimmick or similar, etc) and story/play wise then i'll be happy. Of course i'll still wait for a sale.....can't afford much on my budget. :\