The character hasn’t appeared in any other media until now, so him appearing in Deadpool 2 is a big deal.
In addition to being part of the second X-Force team, he also served on X-Statik, but he was eventually killed in battle.
In fact, the latter scenario is how Zeitgeist (real name Axel Cluney) discovered his mutant ability in the comics, and it unfortunately resulted in a girl’s face being scarred.
Most of the X-Force characters in Deadpool have their own unique superpowers/special abilities, and then there’s Rob Delaney’s Peter, who’s just a normal guy who likes sports, grilling and beekeeping.