I know everyone has their own preferred way of going into movies like this that are based on characters and, sometimes, storylines from other media, but for me, I don't really care too much about character spoilers. I haven't really read comics in ages, so there have been a number of characters in the MCU that I had no prior knowledge of. I never really worried about it either way because these films and TV shows, for the most part, don't really rely heavily on prior knowledge of characters from the books. And I can't really think of a single instance in the MCU where knowing or not knowing a character in advance impacted my enjoyment.
That said, the last word in the above paragraph is the key for me, and I just can't find any reason to be personally interested in this movie. My interest was already near zero, and, if anything, this trailer moved the needle backward for me.
EDIT: And with regard to my last comments, not trying to be a downer, and my desire is not to put down something that others are clearly interested in. I'm just really disinterested for the following reasons:
1. I have really disliked the Deadpool films to this point. Back in the '80s and '90s, I really liked the character. And I get why this interpretation of him is so edgy, but to me, making him THAT edgy and R-rated as he has been in the films was just trying too hard for something that ultimately just made the character overly juvenile and crass, and just didn't work at all for me. So I am disappointed him the big screen treatment of the character and in the films in general.
2. I think the big screen treatment of the X-Men has largely been a debacle as well, although not to the extent as Deadpool. I used to love the X-Men as a kid, but I have cooled off on them considerably, and the big screen treatment of them has not been kind, IMO. No desire to see them cross over into the MCU proper (I actually think that how they were attempting to integrate the inhumans through Agents of SHIELD was very well done, and I wish that would have borne more fruit).
3. Related to #2, the multiverse saga overall in the MCU has been really hit-and-miss, with more misses than hits for me, especially when they try to retcon in other Marvel properties and films. That really goes more to my disappointment in the MCU as a whole after phase 3, but that is a factor in this as well.
Those factors all really just leave me not being the least bit excited about this movie, and as far as I'm concerned, the MCU is just taking a break for 2024. Again, I don't mean to take away from others' enjoyment, but just sharing my own thoughts.