"If the last Jedi is found, the new Jedi will rise."
He seemed to be afraid of that happening....
Also, Poe told Finn to keep the jacket and said "it suits you." The same phrase is said in Pocahontas by her dad when she wears her mother's necklace, and in Moana by her father when she returns from the sea... So... Is Poe Finn's father?