There is gonna be one, but nothing is set yet. they might even backfire the whole thing! If 당신 want a Spirit 2, type in `Spirit 2 petition' & click on the first link.
anyway, it should be about their life with their foal... But something bad happens. Like the humans rebuilding the railroad 또는 something.
I think Rain's and Spirit's 낳다, 새끼 will get captured and Little Creek dies, So it is up to the rest of the herd to save their 낳다, 새끼 without getting killed 또는 hurt 의해 all the weapons the bad guys have.