A team up film between two iconic comic book characters is more of an excuse for Disney to celebrate their merger with Fox and leaves the substance of the film mostly empty.
I think the most frustrating thing about Deadpool & Wolverine (as much as I did really enjoy it) that could’ve been easily fixed. Have the opening TVA stuff, the montage of Deadpool traveling to different universes looking for Logan, but then have the rest of the movie set in Deadpool’s universe with the character’s we’ve come to know and love like Blind Al, Negasonic, Vanessa (they could even have her become Copycat like in the comics) and Colossus fighting alongside Wade to save their universe. While I think Cassandra is an interesting villain visually with her powers, Mr. Paradox is way more interesting and way more threatening as a villain, so why not make HIM the villain overall?
I also had an idea for this film being Deadpool being thrown back in time because of Cabe's time watch thing and it's broken so he couldn't get out of his time zone and thus meeting Logan in between the events of like DOFP and Logan, thus the two of them have to get along and find way to get back to Wade's current timeline (which they do by the third act or so) and have it be like Back to the Future meets The Nice Guys approach. But I really like your idea as well, because it used the supporting cast we knew from the first two films pretty well (also bring back Domino and Russel too) and you can have moments where Colossus and Negasonic telling Logan how their version of Logan was a hero and that helps Logan remember why he's an X-Men to begin with, and you can actually see the stakes of Wade's universe collapsing instead of being told but never shown it, and you can incorporate the MCU/TVA stuff while keeping the smaller scale approach of the first two and having more satisfying arcs for Wade and Logan in terms of them finding their found family and purpose in the world. Plus seeing the Deadpool core fight with Wade, Logan, and the other characters like Domino and Colossus would be really cool to see and your idea of Vanessa showing Wade that she's Copycat would be fun to see, especially Wade's reaction being like "Oh my god, if I didn't love you more than I already have." Plus Mr. Paradox could have been a fun twist villain in where he tricks Wade and Logan to save the universe where in actually he's the one destroying it for a new and marketable world or something in those lines (which can be a fun riff of Disney constantly buying different studios and IPs for their safe and marketable studio). Man, that already sounds like a much more fun and more emotionally satisfying film than the one we got, even tho I respect and am happy for people like you who enjoyed the film we got.
I think the most frustrating thing about Deadpool & Wolverine (as much as I did really enjoy it) that could’ve been easily fixed. Have the opening TVA stuff, the montage of Deadpool traveling to different universes looking for Logan, but then have the rest of the movie set in Deadpool’s universe with the character’s we’ve come to know and love like Blind Al, Negasonic, Vanessa (they could even have her become Copycat like in the comics) and Colossus fighting alongside Wade to save their universe. While I think Cassandra is an interesting villain visually with her powers, Mr. Paradox is way more interesting and way more threatening as a villain, so why not make HIM the villain overall?
I also had an idea for this film being Deadpool being thrown back in time because of Cabe's time watch thing and it's broken so he couldn't get out of his time zone and thus meeting Logan in between the events of like DOFP and Logan, thus the two of them have to get along and find way to get back to Wade's current timeline (which they do by the third act or so) and have it be like Back to the Future meets The Nice Guys approach. But I really like your idea as well, because it used the supporting cast we knew from the first two films pretty well (also bring back Domino and Russel too) and you can have moments where Colossus and Negasonic telling Logan how their version of Logan was a hero and that helps Logan remember why he's an X-Men to begin with, and you can actually see the stakes of Wade's universe collapsing instead of being told but never shown it, and you can incorporate the MCU/TVA stuff while keeping the smaller scale approach of the first two and having more satisfying arcs for Wade and Logan in terms of them finding their found family and purpose in the world. Plus seeing the Deadpool core fight with Wade, Logan, and the other characters like Domino and Colossus would be really cool to see and your idea of Vanessa showing Wade that she's Copycat would be fun to see, especially Wade's reaction being like "Oh my god, if I didn't love you more than I already have." Plus Mr. Paradox could have been a fun twist villain in where he tricks Wade and Logan to save the universe where in actually he's the one destroying it for a new and marketable world or something in those lines (which can be a fun riff of Disney constantly buying different studios and IPs for their safe and marketable studio). Man, that already sounds like a much more fun and more emotionally satisfying film than the one we got, even tho I respect and am happy for people like you who enjoyed the film we got.