In other words, it's everything you want out of a superhero/parody movie. Josh Brolin plays both Cable in Fox's X-Men Universe, as well as Thanos in the Marvel Cinematic Universe, so the fourth-wall-breaking merc-with-a-mouth can be forgiven for making an honest mistake, right?
The danger is so high this time -- because Cable has a metal arm! -- that Deadpool declares, "We're gonna form a super-duper f-cking group!" And thus, X-Force is born ... and we get introduced to the newcomers one by one because this is that kind of trailer.
Joining the returning Colossus and Negasonic Teenage Warhead, we've got Bedlam (see cool action scene with him), Shatterstar (repeat) and Domino (ditto). She has luck powers, which Deadpool doesn't think is very cinematic, but it totally is.
Deadpool doesn't just throw barbs at the MCU, either. After Cable attacks him and monologues him, Deadpool jokes, "So dark. You sure you're not from the DC Universe?" Bang! Shots fired! Sure, "Wonder Woman" was hopeful, but otherwise, yeah. Spot on.