If Stormsplitter splits… er, leaves the battlefield before its triggered ability resolves, the token will still enter as a copy of Stormsplitter, using Stormsplitter’s copiable values from when it was last on the battlefield.

In the unusual case where Stormsplitter becomes a copy of something else while its triggered ability is on the stack but before it resolves, the token will enter as a copy of whatever Stormsplitter is copying.

The token doesn’t copy whether Stormsplitter is tapped or untapped, whether it has any counters on it or Auras and Equipment attached to it, or any non-copy effects that have changed its power, toughness, types, color, and so on.

The token copy will have Stormsplitter’s abilities and will be able to create copies of itself.