It seems that DP’s mission in Deadpool 2, which seems to officially be called Deadpool 2, is to protect this kid from harm, though he ends up calling in some help to do so, in the form of the, incredibly derivative, brand new X-Force.
Deadpool 2 is an escort mission.
It seems that Cable has arrived, from the future we assume, to kill a small boy.
Deadpool, however, doesn’t want to see the kid get dead, even though, based on the trailer, the little squirt seems pretty awful, though he does seem to have some pretty epic fire based mutant powers.