On Robin Hood (2018)
1) It was great fun, and I loved it, and I chalk everyone else's problems with it up to expectations that it be some other movie. That's right, you're all wrong!
2) Also in addition to being facetiously wrong, you are actually wrong. Robin Hood (2018) is a standalone film made by
Lionsgate and should not be confused with the
Sony project in development, Hood, which is intended to start a Robin Hood extended universe. As such it has no place on this poll. Neither does any other Robin Hood movie in development, whether the Margot Robbie vehicle Marian, Disney's Nottingham & Hood, or Dreamworks' Merry Men, or while we're at it, Robin Hood 2058 or Robin Hood and the Prince of Aragorn.
[AV Club Article]
On the topic:
The Mummy is the answer. No one loved The Mummy. No one stans The Mummy, and no other franchise released a group shot of it's universe's high profile stars before it failed. It's not even close. Take of that clear winner and the runner up is a bit of a race, but I'd go with The Amazing Spider-Man. Totally forgettable, though admittedly I haven't and won't see The Conjuring.