Old Boy ~ Why this could be good or bad?

Saw this trailer tonight -

AW YEAH!!! Oldboy!

...Oh, fuck.  Oldboy...

I'm kinda split here.
I have read the entire manga series of Oldboy, the original -

And I find the premise amazing!  The idea of someone being imprisoned alone for years without knowing why and then released to find out why.  That alone is interesting enough to read, and for the first few books it was...
Until the ending.
My review of this series long ago was this (1-10 with 10 being the highest recommendation)
Oldboy - 7, a strong beginning, but a pointless ending.
The ending was underwhelming.  It was one of the worst endings I have ever read (not the absolute worst, but still bad).  There was no way for them to make that ending worst.
Until they made a live action movie-

And it was great UNTIL THE ENDING!  Where they basically just went completely nuts and fucked everything up.  I both love and hate that movie.
And now, I am wondering what they will do to this new one.  I heard it's more acurate to the manga then the original movie is, but it also looks like parts of it are from the movie.

I am both worried and excited.
I also realise that they keep adding on to the years.  First it was 10, then 15, and now 20?
Keep adding the insanity.

P.S.  DON'T WATCH THE FIRST OLDBOY!  FOR THE LOVE OF ALL THAT IS GOOD AND CLEAN, I ORDER YOU - DO NOT WATCH!!!!

UNLESS YOU WANT THERAPY!!!
 

I warned you~