I'll be honest.
I still really don't like Slenderman.
I completely get where he came from, how he got popular, why he's not really scary, all these things, but for some reason my mind continues to be extremely averse to anything with him in it. Heck, I can't even bare to hear the static sound from the games that plays when he kills you.
Despite my irrational creep-out, I watched the first trailer a while ago. Haven't seen the second, might watch it now. I really can't tell if it's going to be good or not, most likely it will just be average. The story doesn't seem at all unique, so beyond that it's really just the visuals that will be the selling point.
I do think they did a good job adapting the parts of the mythos people are familiar with, though, like the pages. However, it looks to me like he's just going to end up being "big, scary, CG monster." The real terror in Slenderman is when you don't see him.
I don't plan on watching it really unless it somehow comes to be in my possession or on Netflix, but I'll probably watch reviews on it. Horror movies never were my thing anyways.
I do agree it might be in poor taste though, especially after what happened a few years ago.