For now who he’s playing is still a mystery, but it would definitely be possible del Toro is more important to the galaxy’s history than we realize.
It’s worth establishing that this is a pretty out-there rumor and while Wikiwand may have listed del Toro it could be based on false information.
Needless to say, he was one of the most high-profile original trilogy characters to not appear in The Force Awakens, so for his offspring to play a part in The Last Jedi would be rather fitting.